diff --git a/app/api.js b/app/api.js
index 29237c05..b7915fa2 100644
--- a/app/api.js
+++ b/app/api.js
@@ -147,7 +147,16 @@ function asyncInitWebSocket(server) {
 
 function listenForResponse(ws, canceller) {
   return new Promise((resolve, reject) => {
+    function handleClose(event) {
+      // a 'close' event before a 'message' event means the request failed
+      ws.removeEventListener('message', handleMessage);
+      const error = canceller.cancelled
+        ? canceller.error
+        : new Error('connection closed');
+      reject(error);
+    }
     function handleMessage(msg) {
+      ws.removeEventListener('close', handleClose);
       try {
         const response = JSON.parse(msg.data);
         if (response.error) {
@@ -156,13 +165,11 @@ function listenForResponse(ws, canceller) {
           resolve(response);
         }
       } catch (e) {
-        ws.close();
-        canceller.cancelled = true;
-        canceller.error = e;
         reject(e);
       }
     }
     ws.addEventListener('message', handleMessage, { once: true });
+    ws.addEventListener('close', handleClose, { once: true });
   });
 }
 
@@ -205,29 +212,35 @@ async function upload(
     let state = await reader.read();
     let size = 0;
     while (!state.done) {
-      const buf = state.value;
       if (canceller.cancelled) {
-        throw canceller.error;
+        ws.close();
       }
-
+      if (ws.readyState !== WebSocket.OPEN) {
+        break;
+      }
+      const buf = state.value;
       ws.send(buf);
-
       onprogress(size);
       size += buf.length;
       state = await reader.read();
-      while (ws.bufferedAmount > ECE_RECORD_SIZE * 2) {
+      while (
+        ws.bufferedAmount > ECE_RECORD_SIZE * 2 &&
+        ws.readyState === WebSocket.OPEN &&
+        !canceller.cancelled
+      ) {
         await delay();
       }
     }
-    const footer = new Uint8Array([0]);
-    ws.send(footer);
+    if (ws.readyState === WebSocket.OPEN) {
+      ws.send(new Uint8Array([0])); //EOF
+    }
 
     await completedResponse;
-    ws.close();
     return uploadInfo;
-  } catch (e) {
-    ws.close(4000);
-    throw e;
+  } finally {
+    if (![WebSocket.CLOSED, WebSocket.CLOSING].includes(ws.readyState)) {
+      ws.close();
+    }
   }
 }
 
diff --git a/package-lock.json b/package-lock.json
index abcf8208..6e10d2aa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1243,6 +1243,25 @@
         "minimalistic-crypto-utils": "^1.0.0"
       }
     },
+    "@dannycoates/express-ws": {
+      "version": "5.0.3",
+      "resolved": "https://registry.npmjs.org/@dannycoates/express-ws/-/express-ws-5.0.3.tgz",
+      "integrity": "sha512-EvHGP+NU2GVeQQDzlJRclN86UxxGJP5er4v8ojVn55cu7zhLLXZ5/QQJu0RcIzh4WHMjgYEE7/bKCohVK946og==",
+      "requires": {
+        "esm": "^3.0.84",
+        "ws": "^7.1.1"
+      },
+      "dependencies": {
+        "ws": {
+          "version": "7.1.1",
+          "resolved": "https://registry.npmjs.org/ws/-/ws-7.1.1.tgz",
+          "integrity": "sha512-o41D/WmDeca0BqYhsr3nJzQyg9NF5X8l/UdnFNux9cS3lwB+swm8qGWX5rn+aD6xfBU3rGmtHij7g7x6LxFU3A==",
+          "requires": {
+            "async-limiter": "^1.0.0"
+          }
+        }
+      }
+    },
     "@dannycoates/webcrypto-liner": {
       "version": "0.1.37",
       "resolved": "https://registry.npmjs.org/@dannycoates/webcrypto-liner/-/webcrypto-liner-0.1.37.tgz",
@@ -1509,9 +1528,9 @@
       }
     },
     "@sinonjs/samsam": {
-      "version": "3.3.1",
-      "resolved": "https://registry.npmjs.org/@sinonjs/samsam/-/samsam-3.3.1.tgz",
-      "integrity": "sha512-wRSfmyd81swH0hA1bxJZJ57xr22kC07a1N4zuIL47yTS04bDk6AoCkczcqHEjcRPmJ+FruGJ9WBQiJwMtIElFw==",
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/@sinonjs/samsam/-/samsam-3.3.2.tgz",
+      "integrity": "sha512-ILO/rR8LfAb60Y1Yfp9vxfYAASK43NFC2mLzpvLUbCQY/Qu8YwReboseu8aheCEkyElZF2L2T9mHcR2bgdvZyA==",
       "dev": true,
       "requires": {
         "@sinonjs/commons": "^1.0.2",
@@ -2340,9 +2359,9 @@
       }
     },
     "aws-sdk": {
-      "version": "2.503.0",
-      "resolved": "https://registry.npmjs.org/aws-sdk/-/aws-sdk-2.503.0.tgz",
-      "integrity": "sha512-DPwRxhPYCGNvKL9rUhpAoOVpMRyISbVMlXykLQknYo7wyOI+jYcyA7t8H7IFPAqj4ZG+R+Au9tO/KT4im+2gbg==",
+      "version": "2.505.0",
+      "resolved": "https://registry.npmjs.org/aws-sdk/-/aws-sdk-2.505.0.tgz",
+      "integrity": "sha512-VSPSUl1xt0K+YAjNGbrNOOJ/q6X9GBIeg+vzxBBy4oX9SkZitKVuvIB6uc4fio9XQkYKvCdl8V/vMsQWyIvVgw==",
       "requires": {
         "buffer": "4.9.1",
         "events": "1.1.1",
@@ -2484,9 +2503,9 @@
       }
     },
     "base64-js": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
-      "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw=="
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.1.tgz",
+      "integrity": "sha512-mLQ4i2QO1ytvGWFWmcngKO//JXAQueZvwEKtjgQFM4jIK0kU+ytMfplL8j+n5mspOfjHwoAg+9yhb7BwAHm36g=="
     },
     "basic-auth": {
       "version": "2.0.1",
@@ -4094,9 +4113,9 @@
       }
     },
     "css-loader": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/css-loader/-/css-loader-3.1.0.tgz",
-      "integrity": "sha512-MuL8WsF/KSrHCBCYaozBKlx+r7vIfUaDTEreo7wR7Vv3J6N0z6fqWjRk3e/6wjneitXN1r/Y9FTK1psYNOBdJQ==",
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/css-loader/-/css-loader-3.2.0.tgz",
+      "integrity": "sha512-QTF3Ud5H7DaZotgdcJjGMvyDj5F3Pn1j/sC6VBEOVp94cbwqyIBdcs/quzj4MC1BKQSrTpQznegH/5giYbhnCQ==",
       "dev": true,
       "requires": {
         "camelcase": "^5.3.1",
@@ -4174,15 +4193,15 @@
           }
         },
         "postcss-value-parser": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.0.0.tgz",
-          "integrity": "sha512-ESPktioptiSUchCKgggAkzdmkgzKfmp0EU8jXH+5kbIUB+unr0Y4CY9SRMvibuvYUBjNh1ACLbxqYNpdTQOteQ==",
+          "version": "4.0.2",
+          "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.0.2.tgz",
+          "integrity": "sha512-LmeoohTpp/K4UiyQCwuGWlONxXamGzCMtFxLq4W1nZVGIQLYvMCJx3yAF9qyyuFpflABI9yVdtJAqbihOsCsJQ==",
           "dev": true
         },
         "schema-utils": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-2.0.1.tgz",
-          "integrity": "sha512-HJFKJ4JixDpRur06QHwi8uu2kZbng318ahWEKgBjc0ZklcE4FDvmm2wghb448q0IRaABxIESt8vqPFvwgMB80A==",
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-2.1.0.tgz",
+          "integrity": "sha512-g6SViEZAfGNrToD82ZPUjq52KUPDYc+fN5+g6Euo5mLokl/9Yx14z0Cu4RR1m55HtBXejO0sBt+qw79axN+Fiw==",
           "dev": true,
           "requires": {
             "ajv": "^6.1.0",
@@ -5986,14 +6005,6 @@
         }
       }
     },
-    "express-ws": {
-      "version": "github:dannycoates/express-ws#d0910a43b1802b22476362113557e20b18e185ba",
-      "from": "github:dannycoates/express-ws",
-      "requires": {
-        "esm": "^3.0.84",
-        "ws": "github:dannycoates/ws"
-      }
-    },
     "extend": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
@@ -6278,9 +6289,9 @@
       }
     },
     "file-loader": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/file-loader/-/file-loader-4.1.0.tgz",
-      "integrity": "sha512-ajDk1nlByoalZAGR4b0H6oD+EGlWnyW1qbSxzaUc7RFiqmn+RbXQQRbTc72jsiUIlVusJ4Et58ltds8ZwTfnAw==",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/file-loader/-/file-loader-4.2.0.tgz",
+      "integrity": "sha512-+xZnaK5R8kBJrHK0/6HRlrKNamvVS5rjyuju+rnyxRGuwUJwpAMsVzUl5dz6rK8brkzjV6JpcFNjp6NqV0g1OQ==",
       "dev": true,
       "requires": {
         "loader-utils": "^1.2.3",
@@ -6288,9 +6299,9 @@
       },
       "dependencies": {
         "schema-utils": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-2.0.1.tgz",
-          "integrity": "sha512-HJFKJ4JixDpRur06QHwi8uu2kZbng318ahWEKgBjc0ZklcE4FDvmm2wghb448q0IRaABxIESt8vqPFvwgMB80A==",
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-2.1.0.tgz",
+          "integrity": "sha512-g6SViEZAfGNrToD82ZPUjq52KUPDYc+fN5+g6Euo5mLokl/9Yx14z0Cu4RR1m55HtBXejO0sBt+qw79axN+Fiw==",
           "dev": true,
           "requires": {
             "ajv": "^6.1.0",
@@ -6635,9 +6646,9 @@
       },
       "dependencies": {
         "graceful-fs": {
-          "version": "4.2.0",
-          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.0.tgz",
-          "integrity": "sha512-jpSvDPV4Cq/bgtpndIWbI5hmYxhQGHPC4d4cqBPb4DLniCfhJokdXhwhaDuLBGLQdvvRum/UiX6ECVIPvDXqdg==",
+          "version": "4.2.1",
+          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.1.tgz",
+          "integrity": "sha512-b9usnbDGnD928gJB3LrCmxoibr3VE4U2SMo5PBuBnokWyDADTqDPXg4YpwKF1trpH+UbGp7QLicO3+aWEy0+mw==",
           "dev": true
         }
       }
@@ -9649,9 +9660,10 @@
       }
     },
     "lodash": {
-      "version": "4.17.11",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
-      "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg=="
+      "version": "4.17.15",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+      "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==",
+      "dev": true
     },
     "lodash._reinterpolate": {
       "version": "3.0.0",
@@ -9792,9 +9804,9 @@
       "dev": true
     },
     "lolex": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/lolex/-/lolex-4.0.1.tgz",
-      "integrity": "sha512-UHuOBZ5jjsKuzbB/gRNNW8Vg8f00Emgskdq2kvZxgBJCS0aqquAuXai/SkWORlKeZEiNQWZjFZOqIUcH9LqKCw==",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/lolex/-/lolex-4.2.0.tgz",
+      "integrity": "sha512-gKO5uExCXvSm6zbF562EvM+rd1kQDnB9AZBbiQVzf1ZmdDpxUSvpnAaVOP83N/31mRK8Ml8/VE8DMvsAZQ+7wg==",
       "dev": true
     },
     "longest-streak": {
@@ -10274,9 +10286,9 @@
       }
     },
     "mixin-deep": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/mixin-deep/-/mixin-deep-1.3.1.tgz",
-      "integrity": "sha512-8ZItLHeEgaqEvd5lYBXfm4EZSFCX29Jb9K+lAHhDKzReKBQKj3R+7NOF6tjqYi9t4oI8VUfaWITJQm86wnXGNQ==",
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/mixin-deep/-/mixin-deep-1.3.2.tgz",
+      "integrity": "sha512-WRoDn//mXBiJ1H40rqa3vH0toePwSsGb45iInWlTySa+Uu4k3tYUSxa2v1KqAiLtvlrSzaExqS1gtk96A9zvEA==",
       "dev": true,
       "requires": {
         "for-in": "^1.0.2",
@@ -10667,15 +10679,15 @@
       "integrity": "sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ=="
     },
     "nise": {
-      "version": "1.4.10",
-      "resolved": "https://registry.npmjs.org/nise/-/nise-1.4.10.tgz",
-      "integrity": "sha512-sa0RRbj53dovjc7wombHmVli9ZihXbXCQ2uH3TNm03DyvOSIQbxg+pbqDKrk2oxMK1rtLGVlKxcB9rrc6X5YjA==",
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/nise/-/nise-1.5.1.tgz",
+      "integrity": "sha512-edFWm0fsFG2n318rfEnKlTZTkjlbVOFF9XIA+fj+Ed+Qz1laYW2lobwavWoMzGrYDHH1EpiNJgDfvGnkZztR/g==",
       "dev": true,
       "requires": {
-        "@sinonjs/formatio": "^3.1.0",
+        "@sinonjs/formatio": "^3.2.1",
         "@sinonjs/text-encoding": "^0.7.1",
         "just-extend": "^4.0.2",
-        "lolex": "^2.3.2",
+        "lolex": "^4.1.0",
         "path-to-regexp": "^1.7.0"
       },
       "dependencies": {
@@ -10685,12 +10697,6 @@
           "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
           "dev": true
         },
-        "lolex": {
-          "version": "2.7.5",
-          "resolved": "https://registry.npmjs.org/lolex/-/lolex-2.7.5.tgz",
-          "integrity": "sha512-l9x0+1offnKKIzYVjyXU2SiwhXDLekRzKyhnbyldPHvC7BvLPVpdNUNR2KeMAiCN2D/kLNttZgQD5WjSxuBx3Q==",
-          "dev": true
-        },
         "path-to-regexp": {
           "version": "1.7.0",
           "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-1.7.0.tgz",
@@ -12567,9 +12573,9 @@
           }
         },
         "postcss-value-parser": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.0.0.tgz",
-          "integrity": "sha512-ESPktioptiSUchCKgggAkzdmkgzKfmp0EU8jXH+5kbIUB+unr0Y4CY9SRMvibuvYUBjNh1ACLbxqYNpdTQOteQ==",
+          "version": "4.0.2",
+          "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.0.2.tgz",
+          "integrity": "sha512-LmeoohTpp/K4UiyQCwuGWlONxXamGzCMtFxLq4W1nZVGIQLYvMCJx3yAF9qyyuFpflABI9yVdtJAqbihOsCsJQ==",
           "dev": true
         },
         "source-map": {
@@ -13649,6 +13655,16 @@
       "resolved": "https://registry.npmjs.org/redis-parser/-/redis-parser-2.6.0.tgz",
       "integrity": "sha1-Uu0J2srBCPGmMcB+m2mUHnoZUEs="
     },
+    "reduce-css-calc": {
+      "version": "2.1.6",
+      "resolved": "https://registry.npmjs.org/reduce-css-calc/-/reduce-css-calc-2.1.6.tgz",
+      "integrity": "sha512-+l5/qlQmdsbM9h6JerJ/y5vR5Ci0k93aszLNpCmbadC3nBcbRGmIBm0s9Nj59i22LvCjTGftWzdQRwdknayxhw==",
+      "dev": true,
+      "requires": {
+        "css-unit-converter": "^1.1.1",
+        "postcss-value-parser": "^3.3.0"
+      }
+    },
     "referrer-policy": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/referrer-policy/-/referrer-policy-1.2.0.tgz",
@@ -14265,6 +14281,11 @@
             "pend": "~1.2.0"
           }
         },
+        "lodash": {
+          "version": "4.17.15",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+          "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A=="
+        },
         "ms": {
           "version": "2.1.1",
           "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
@@ -14446,9 +14467,9 @@
       "dev": true
     },
     "set-value": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/set-value/-/set-value-2.0.0.tgz",
-      "integrity": "sha512-hw0yxk9GT/Hr5yJEYnHNKYXkIA8mVJgd9ditYZCe16ZczcaELYYcfvaXesNACk2O8O0nTiPQcQhGUQj8JLzeeg==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/set-value/-/set-value-2.0.1.tgz",
+      "integrity": "sha512-JxHc1weCN68wRY0fhCoXpyK55m/XPHafOmK4UWD7m2CI14GMcFypt4w/0+NV5f/ZMby2F6S2wwA7fgynh9gWSw==",
       "dev": true,
       "requires": {
         "extend-shallow": "^2.0.1",
@@ -14548,17 +14569,17 @@
       }
     },
     "sinon": {
-      "version": "7.3.2",
-      "resolved": "https://registry.npmjs.org/sinon/-/sinon-7.3.2.tgz",
-      "integrity": "sha512-thErC1z64BeyGiPvF8aoSg0LEnptSaWE7YhdWWbWXgelOyThent7uKOnnEh9zBxDbKixtr5dEko+ws1sZMuFMA==",
+      "version": "7.4.1",
+      "resolved": "https://registry.npmjs.org/sinon/-/sinon-7.4.1.tgz",
+      "integrity": "sha512-7s9buHGHN/jqoy/v4bJgmt0m1XEkCEd/tqdHXumpBp0JSujaT4Ng84JU5wDdK4E85ZMq78NuDe0I3NAqXY8TFg==",
       "dev": true,
       "requires": {
         "@sinonjs/commons": "^1.4.0",
         "@sinonjs/formatio": "^3.2.1",
-        "@sinonjs/samsam": "^3.3.1",
+        "@sinonjs/samsam": "^3.3.2",
         "diff": "^3.5.0",
-        "lolex": "^4.0.1",
-        "nise": "^1.4.10",
+        "lolex": "^4.2.0",
+        "nise": "^1.5.1",
         "supports-color": "^5.5.0"
       },
       "dependencies": {
@@ -15745,9 +15766,9 @@
       }
     },
     "tailwindcss": {
-      "version": "1.0.6",
-      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-1.0.6.tgz",
-      "integrity": "sha512-hhdvXpnlYNnxfZCpldMypSWRzgmoQbKBy3namGlsP0Gs+qM8EwF3DBVUPoq8wJYbBFjzrgatE4czWJ6f12Y9+Q==",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-1.1.0.tgz",
+      "integrity": "sha512-hcxY5MUrY/LcdsX4Xr2aOF24eF4HaxDbHCbDu3W2+bCJRsXRhJmZfAgjipjsyhZult0YAa9HFp14xRXMqwUYTw==",
       "dev": true,
       "requires": {
         "autoprefixer": "^9.4.5",
@@ -15762,7 +15783,8 @@
         "postcss-js": "^2.0.0",
         "postcss-nested": "^4.1.1",
         "postcss-selector-parser": "^6.0.0",
-        "pretty-hrtime": "^1.0.3"
+        "pretty-hrtime": "^1.0.3",
+        "reduce-css-calc": "^2.1.6"
       },
       "dependencies": {
         "ansi-styles": {
@@ -15845,9 +15867,9 @@
       }
     },
     "terser": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-4.1.2.tgz",
-      "integrity": "sha512-jvNoEQSPXJdssFwqPSgWjsOrb+ELoE+ILpHPKXC83tIxOlh2U75F1KuB2luLD/3a6/7K3Vw5pDn+hvu0C4AzSw==",
+      "version": "4.1.3",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-4.1.3.tgz",
+      "integrity": "sha512-on13d+cnpn5bMouZu+J8tPYQecsdRJCJuxFJ+FVoPBoLJgk5bCBkp+Uen2hWyi0KIUm6eDarnlAlH+KgIx/PuQ==",
       "dev": true,
       "requires": {
         "commander": "^2.20.0",
@@ -15936,9 +15958,9 @@
           "dev": true
         },
         "webpack-sources": {
-          "version": "1.4.1",
-          "resolved": "https://registry.npmjs.org/webpack-sources/-/webpack-sources-1.4.1.tgz",
-          "integrity": "sha512-XSz38193PTo/1csJabKaV4b53uRVotlMgqJXm3s3eje0Bu6gQTxYDqpD38CmQfDBA+gN+QqaGjasuC8I/7eW3Q==",
+          "version": "1.4.3",
+          "resolved": "https://registry.npmjs.org/webpack-sources/-/webpack-sources-1.4.3.tgz",
+          "integrity": "sha512-lgTS3Xhv1lCOKo7SA5TjKXMjpSM4sBjNV5+q2bqesbSPs5FjGmU6jjtBSkX9b4qW87vDIsCIlUPOEhbZrMdjeQ==",
           "dev": true,
           "requires": {
             "source-list-map": "^2.0.0",
@@ -16271,11 +16293,6 @@
         }
       }
     },
-    "ultron": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/ultron/-/ultron-1.1.1.tgz",
-      "integrity": "sha512-UIEXBNeYmKptWH6z8ZnqTeS8fV74zG0/eRU9VGkpzz+LIJNs8W/zM/L+7ctCkRrgbNnnR0xxw4bKOr0cW0N0Og=="
-    },
     "unassert": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/unassert/-/unassert-1.5.1.tgz",
@@ -16354,38 +16371,15 @@
       }
     },
     "union-value": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.0.tgz",
-      "integrity": "sha1-XHHDTLW61dzr4+oM0IIHulqhrqQ=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.1.tgz",
+      "integrity": "sha512-tJfXmxMeWYnczCVs7XAEvIV7ieppALdyepWMkHkwciRpZraG/xwT+s2JN8+pr1+8jCRf80FFzvr+MpQeeoF4Xg==",
       "dev": true,
       "requires": {
         "arr-union": "^3.1.0",
         "get-value": "^2.0.6",
         "is-extendable": "^0.1.1",
-        "set-value": "^0.4.3"
-      },
-      "dependencies": {
-        "extend-shallow": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
-          "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
-          "dev": true,
-          "requires": {
-            "is-extendable": "^0.1.0"
-          }
-        },
-        "set-value": {
-          "version": "0.4.3",
-          "resolved": "https://registry.npmjs.org/set-value/-/set-value-0.4.3.tgz",
-          "integrity": "sha1-fbCPnT0i3H945Trzw79GZuzfzPE=",
-          "dev": true,
-          "requires": {
-            "extend-shallow": "^2.0.1",
-            "is-extendable": "^0.1.1",
-            "is-plain-object": "^2.0.1",
-            "to-object-path": "^0.3.0"
-          }
-        }
+        "set-value": "^2.0.1"
       }
     },
     "uniq": {
@@ -17185,34 +17179,34 @@
       }
     },
     "webpack": {
-      "version": "4.39.1",
-      "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.39.1.tgz",
-      "integrity": "sha512-/LAb2TJ2z+eVwisldp3dqTEoNhzp/TLCZlmZm3GGGAlnfIWDgOEE758j/9atklNLfRyhKbZTCOIoPqLJXeBLbQ==",
+      "version": "4.38.0",
+      "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.38.0.tgz",
+      "integrity": "sha512-lbuFsVOq8PZY+1Ytz/mYOvYOo+d4IJ31hHk/7iyoeWtwN33V+5HYotSH+UIb9tq914ey0Hot7z6HugD+je3sWw==",
       "dev": true,
       "requires": {
         "@webassemblyjs/ast": "1.8.5",
         "@webassemblyjs/helper-module-context": "1.8.5",
         "@webassemblyjs/wasm-edit": "1.8.5",
         "@webassemblyjs/wasm-parser": "1.8.5",
-        "acorn": "^6.2.1",
-        "ajv": "^6.10.2",
-        "ajv-keywords": "^3.4.1",
-        "chrome-trace-event": "^1.0.2",
+        "acorn": "^6.2.0",
+        "ajv": "^6.1.0",
+        "ajv-keywords": "^3.1.0",
+        "chrome-trace-event": "^1.0.0",
         "enhanced-resolve": "^4.1.0",
-        "eslint-scope": "^4.0.3",
+        "eslint-scope": "^4.0.0",
         "json-parse-better-errors": "^1.0.2",
-        "loader-runner": "^2.4.0",
-        "loader-utils": "^1.2.3",
-        "memory-fs": "^0.4.1",
-        "micromatch": "^3.1.10",
-        "mkdirp": "^0.5.1",
-        "neo-async": "^2.6.1",
-        "node-libs-browser": "^2.2.1",
+        "loader-runner": "^2.3.0",
+        "loader-utils": "^1.1.0",
+        "memory-fs": "~0.4.1",
+        "micromatch": "^3.1.8",
+        "mkdirp": "~0.5.0",
+        "neo-async": "^2.5.0",
+        "node-libs-browser": "^2.0.0",
         "schema-utils": "^1.0.0",
-        "tapable": "^1.1.3",
-        "terser-webpack-plugin": "^1.4.1",
-        "watchpack": "^1.6.0",
-        "webpack-sources": "^1.4.1"
+        "tapable": "^1.1.0",
+        "terser-webpack-plugin": "^1.1.0",
+        "watchpack": "^1.5.0",
+        "webpack-sources": "^1.3.0"
       },
       "dependencies": {
         "acorn": {
@@ -17221,24 +17215,6 @@
           "integrity": "sha512-JD0xT5FCRDNyjDda3Lrg/IxFscp9q4tiYtxE1/nOzlKCk7hIRuYjhq1kCNkbPjMRMZuFq20HNQn1I9k8Oj0E+Q==",
           "dev": true
         },
-        "ajv": {
-          "version": "6.10.2",
-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
-          "integrity": "sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==",
-          "dev": true,
-          "requires": {
-            "fast-deep-equal": "^2.0.1",
-            "fast-json-stable-stringify": "^2.0.0",
-            "json-schema-traverse": "^0.4.1",
-            "uri-js": "^4.2.2"
-          }
-        },
-        "ajv-keywords": {
-          "version": "3.4.1",
-          "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.4.1.tgz",
-          "integrity": "sha512-RO1ibKvd27e6FEShVFfPALuHI3WjSVNeK5FIsmme/LYRNxjKuNj+Dt7bucLa6NdSv3JcVTyMlm9kGR84z1XpaQ==",
-          "dev": true
-        },
         "eslint-scope": {
           "version": "4.0.3",
           "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-4.0.3.tgz",
@@ -17248,28 +17224,6 @@
             "esrecurse": "^4.1.0",
             "estraverse": "^4.1.1"
           }
-        },
-        "source-map": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-          "dev": true
-        },
-        "tapable": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/tapable/-/tapable-1.1.3.tgz",
-          "integrity": "sha512-4WK/bYZmj8xLr+HUCODHGF1ZFzsYffasLUgEiMBY4fgtltdO6B4WJtlSbPaDTLpYTcGVwM2qLnFTICEcNxs3kA==",
-          "dev": true
-        },
-        "webpack-sources": {
-          "version": "1.4.1",
-          "resolved": "https://registry.npmjs.org/webpack-sources/-/webpack-sources-1.4.1.tgz",
-          "integrity": "sha512-XSz38193PTo/1csJabKaV4b53uRVotlMgqJXm3s3eje0Bu6gQTxYDqpD38CmQfDBA+gN+QqaGjasuC8I/7eW3Q==",
-          "dev": true,
-          "requires": {
-            "source-list-map": "^2.0.0",
-            "source-map": "~0.6.1"
-          }
         }
       }
     },
@@ -17692,31 +17646,6 @@
       "integrity": "sha512-nqHUnMXmBzT0w570r2JpJxfiSD1IzoI+HGVdd3aZ0yNi3ngvQ4jv1dtHt5VGxfI2yj5yqImPhOK4vmIh2xMbGg==",
       "dev": true
     },
-    "websocket-stream": {
-      "version": "5.5.0",
-      "resolved": "https://registry.npmjs.org/websocket-stream/-/websocket-stream-5.5.0.tgz",
-      "integrity": "sha512-EXy/zXb9kNHI07TIMz1oIUIrPZxQRA8aeJ5XYg5ihV8K4kD1DuA+FY6R96HfdIHzlSzS8HiISAfrm+vVQkZBug==",
-      "requires": {
-        "duplexify": "^3.5.1",
-        "inherits": "^2.0.1",
-        "readable-stream": "^2.3.3",
-        "safe-buffer": "^5.1.2",
-        "ws": "^3.2.0",
-        "xtend": "^4.0.0"
-      },
-      "dependencies": {
-        "ws": {
-          "version": "3.3.3",
-          "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
-          "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
-          "requires": {
-            "async-limiter": "~1.0.0",
-            "safe-buffer": "~5.1.0",
-            "ultron": "~1.1.0"
-          }
-        }
-      }
-    },
     "wgxpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/wgxpath/-/wgxpath-1.0.0.tgz",
@@ -17819,8 +17748,9 @@
       }
     },
     "ws": {
-      "version": "github:dannycoates/ws#c83cbb3bce478122cedcb8c475d9e86e1112824a",
-      "from": "github:dannycoates/ws",
+      "version": "6.1.2",
+      "resolved": "github:dannycoates/ws#c83cbb3bce478122cedcb8c475d9e86e1112824a",
+      "dev": true,
       "requires": {
         "async-limiter": "~1.0.0"
       }
diff --git a/package.json b/package.json
index e54ea2bc..759ee119 100644
--- a/package.json
+++ b/package.json
@@ -70,13 +70,13 @@
     "asmcrypto.js": "^0.22.0",
     "babel-loader": "^8.0.6",
     "babel-plugin-istanbul": "^5.2.0",
-    "base64-js": "^1.3.0",
+    "base64-js": "^1.3.1",
     "content-disposition": "^0.5.3",
     "copy-webpack-plugin": "^5.0.4",
     "core-js": "^3.1.4",
     "crc": "^3.8.0",
     "cross-env": "^5.2.0",
-    "css-loader": "^3.1.0",
+    "css-loader": "^3.2.0",
     "css-mqpacker": "^7.0.0",
     "cssnano": "^4.1.10",
     "eslint": "^6.1.0",
@@ -88,7 +88,7 @@
     "extract-loader": "^3.1.0",
     "extract-text-webpack-plugin": "^4.0.0-beta.0",
     "fast-text-encoding": "^1.0.0",
-    "file-loader": "^4.1.0",
+    "file-loader": "^4.2.0",
     "git-rev-sync": "^1.12.0",
     "html-loader": "^0.5.5",
     "http_ece": "^1.1.0",
@@ -112,14 +112,14 @@
     "redis-mock": "^0.45.0",
     "rimraf": "^2.6.3",
     "script-loader": "^0.7.2",
-    "sinon": "^7.3.2",
+    "sinon": "^7.4.1",
     "string-hash": "^1.1.3",
     "stylelint": "^10.1.0",
     "stylelint-config-standard": "^18.3.0",
     "stylelint-no-unsupported-browser-features": "^3.0.2",
     "svgo": "^1.3.0",
     "svgo-loader": "^2.2.1",
-    "tailwindcss": "^1.0.6",
+    "tailwindcss": "^1.1.0",
     "val-loader": "^1.1.1",
     "wdio-docker-service": "^1.4.2",
     "wdio-dot-reporter": "0.0.10",
@@ -129,7 +129,7 @@
     "wdio-selenium-standalone-service": "0.0.12",
     "wdio-spec-reporter": "^0.1.5",
     "webdriverio": "^4.14.4",
-    "webpack": "^4.39.1",
+    "webpack": "4.38.0",
     "webpack-cli": "^3.3.6",
     "webpack-dev-middleware": "^3.7.0",
     "webpack-dev-server": "^3.7.2",
@@ -137,16 +137,16 @@
     "webpack-unassert-loader": "^1.2.0"
   },
   "dependencies": {
+    "@dannycoates/express-ws": "^5.0.3",
     "@fluent/bundle": "^0.13.0",
     "@fluent/langneg": "^0.3.0",
     "@google-cloud/storage": "^3.0.4",
-    "aws-sdk": "^2.503.0",
+    "aws-sdk": "^2.505.0",
     "body-parser": "^1.19.0",
     "choo": "^6.13.3",
     "cldr-core": "^35.1.0",
     "convict": "^5.1.0",
     "express": "^4.17.1",
-    "express-ws": "github:dannycoates/express-ws",
     "fxa-geodb": "^1.0.4",
     "helmet": "^3.20.0",
     "mkdirp": "^0.5.1",
@@ -155,8 +155,7 @@
     "raven": "^2.6.4",
     "redis": "^2.8.0",
     "selenium-standalone": "^6.15.6",
-    "ua-parser-js": "^0.7.20",
-    "websocket-stream": "^5.5.0"
+    "ua-parser-js": "^0.7.20"
   },
   "availableLanguages": [
     "en-US",
diff --git a/server/bin/dev.js b/server/bin/dev.js
index de9b1b08..f1a1dec1 100644
--- a/server/bin/dev.js
+++ b/server/bin/dev.js
@@ -3,7 +3,7 @@ const routes = require('../routes');
 const pages = require('../routes/pages');
 const tests = require('../../test/frontend/routes');
 const express = require('express');
-const expressWs = require('express-ws');
+const expressWs = require('@dannycoates/express-ws');
 const morgan = require('morgan');
 const config = require('../config');
 
diff --git a/server/bin/prod.js b/server/bin/prod.js
index 56e35f1b..5f509dc3 100644
--- a/server/bin/prod.js
+++ b/server/bin/prod.js
@@ -4,7 +4,7 @@ const Raven = require('raven');
 const config = require('../config');
 const routes = require('../routes');
 const pages = require('../routes/pages');
-const expressWs = require('express-ws');
+const expressWs = require('@dannycoates/express-ws');
 
 if (config.sentry_dsn) {
   Raven.config(config.sentry_dsn).install();
diff --git a/server/bin/test.js b/server/bin/test.js
index 9a4fa5e3..5cbed848 100644
--- a/server/bin/test.js
+++ b/server/bin/test.js
@@ -2,7 +2,7 @@ const assets = require('../../common/assets');
 const routes = require('../routes');
 const pages = require('../routes/pages');
 const tests = require('../../test/frontend/routes');
-const expressWs = require('express-ws');
+const expressWs = require('@dannycoates/express-ws');
 
 module.exports = function(app, devServer) {
   assets.setMiddleware(devServer.middleware);
diff --git a/server/routes/ws.js b/server/routes/ws.js
index c893c99f..32ea7905 100644
--- a/server/routes/ws.js
+++ b/server/routes/ws.js
@@ -3,12 +3,11 @@ const storage = require('../storage');
 const config = require('../config');
 const mozlog = require('../log');
 const Limiter = require('../limiter');
-const wsStream = require('websocket-stream/stream');
 const fxa = require('../fxa');
 const { statUploadEvent } = require('../amplitude');
 const { encryptedSize } = require('../../app/utils');
 
-const { Duplex } = require('stream');
+const { Transform } = require('stream');
 
 const log = mozlog('send.upload');
 
@@ -76,25 +75,19 @@ module.exports = function(ws, req) {
         })
       );
       const limiter = new Limiter(encryptedSize(maxFileSize));
-      const flowControl = new Duplex({
-        read() {
-          ws.resume();
-        },
-        write(chunk, encoding, callback) {
+      const eof = new Transform({
+        transform: function(chunk, encoding, callback) {
           if (chunk.length === 1 && chunk[0] === 0) {
             this.push(null);
           } else {
-            if (!this.push(chunk)) {
-              ws.pause();
-            }
+            this.push(chunk);
           }
           callback();
         }
       });
+      const wsStream = ws.constructor.createWebSocketStream(ws);
 
-      fileStream = wsStream(ws, { binary: true })
-        .pipe(flowControl)
-        .pipe(limiter); // limiter needs to be the last in the chain
+      fileStream = wsStream.pipe(eof).pipe(limiter); // limiter needs to be the last in the chain
 
       await storage.set(newId, fileStream, meta, timeLimit);
 
@@ -126,8 +119,8 @@ module.exports = function(ws, req) {
             error: e === 'limit' ? 413 : 500
           })
         );
-        ws.close();
       }
     }
+    ws.close();
   });
 };
diff --git a/server/storage/gcs.js b/server/storage/gcs.js
index 14466377..66058519 100644
--- a/server/storage/gcs.js
+++ b/server/storage/gcs.js
@@ -22,7 +22,7 @@ class GCSStorage {
         .pipe(
           this.bucket.file(id).createWriteStream({
             validation: false,
-            resumable: false
+            resumable: true
           })
         )
         .on('error', reject)
diff --git a/test/testServer.js b/test/testServer.js
index 66b1d46d..235cd427 100644
--- a/test/testServer.js
+++ b/test/testServer.js
@@ -6,7 +6,7 @@ module.exports = {
       const webpack = require('webpack');
       const middleware = require('webpack-dev-middleware');
       const express = require('express');
-      const expressWs = require('express-ws');
+      const expressWs = require('@dannycoates/express-ws');
       const assets = require('../common/assets');
       const routes = require('../server/routes');
       const tests = require('./frontend/routes');