diff --git a/packages/client/package.json b/packages/client/package.json
index bd11858f7..21093cdb7 100644
--- a/packages/client/package.json
+++ b/packages/client/package.json
@@ -20,6 +20,7 @@
 		"autosize": "5.0.1",
 		"autwh": "0.1.0",
 		"blurhash": "1.1.5",
+		"broadcast-channel": "4.11.0",
 		"chart.js": "3.7.1",
 		"chartjs-adapter-date-fns": "2.0.0",
 		"chartjs-plugin-gradient": "0.2.2",
diff --git a/packages/client/src/pizzax.ts b/packages/client/src/pizzax.ts
index e71f13924..5de866ef6 100644
--- a/packages/client/src/pizzax.ts
+++ b/packages/client/src/pizzax.ts
@@ -4,6 +4,7 @@ import { api } from './os';
 import { get, set } from './scripts/idb-proxy';
 import { defaultStore } from './store';
 import { stream } from './stream';
+import { BroadcastChannel } from 'broadcast-channel';
 
 type StateDef = Record<string, {
 	where: 'account' | 'device' | 'deviceAccount';
diff --git a/packages/client/src/scripts/unison-reload.ts b/packages/client/src/scripts/unison-reload.ts
index 0cd7eff38..b5afe9b07 100644
--- a/packages/client/src/scripts/unison-reload.ts
+++ b/packages/client/src/scripts/unison-reload.ts
@@ -1,4 +1,6 @@
-export const reloadChannel = new BroadcastChannel('reload'); // string | null
+import { BroadcastChannel } from 'broadcast-channel';
+
+export const reloadChannel = new BroadcastChannel<string | null>('reload');
 
 // BroadcastChannelを用いて、クライアントが一斉にreloadするようにします。
 export function unisonReload(path?: string) {
diff --git a/packages/client/yarn.lock b/packages/client/yarn.lock
index 1fc385e33..0fc35ddec 100644
--- a/packages/client/yarn.lock
+++ b/packages/client/yarn.lock
@@ -33,6 +33,13 @@
   resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.13.9.tgz#ca34cb95e1c2dd126863a84465ae8ef66114be99"
   integrity sha512-nEUfRiARCcaVo3ny3ZQjURjHQZUo/JkEw7rLlSZy/psWGnvwXFtPcr6jb7Yb41DVW5LTe6KRq9LGleRNsg1Frw==
 
+"@babel/runtime@^7.16.0", "@babel/runtime@^7.6.2":
+  version "7.17.9"
+  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.17.9.tgz#d19fbf802d01a8cb6cf053a64e472d42c434ba72"
+  integrity sha512-lSiBBvodq29uShpWGNbgFdKYNiFDo5/HIYsaCEY9ff4sb10x9jizo2+pRrSyF4jKZCXqgzuqBOQKbUm90gQwJg==
+  dependencies:
+    regenerator-runtime "^0.13.4"
+
 "@babel/types@^7.6.1", "@babel/types@^7.9.6":
   version "7.13.0"
   resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.13.0.tgz#74424d2816f0171b4100f0ab34e9a374efdf7f80"
@@ -1272,6 +1279,19 @@ braces@^3.0.1, braces@~3.0.2:
   dependencies:
     fill-range "^7.0.1"
 
+broadcast-channel@4.11.0:
+  version "4.11.0"
+  resolved "https://registry.yarnpkg.com/broadcast-channel/-/broadcast-channel-4.11.0.tgz#b9ebc7ce1326120088e61d2197477496908a1a9e"
+  integrity sha512-4FS1Zk+ttekfXHq5I2R7KhN9AsnZUFVV5SczrTtnZPuf5w+jw+fqM1PJHuHzwEXJezJeCbJxoZMDcFqsIN2c1Q==
+  dependencies:
+    "@babel/runtime" "^7.16.0"
+    detect-node "^2.1.0"
+    microtime "3.0.0"
+    oblivious-set "1.0.0"
+    p-queue "6.6.2"
+    rimraf "3.0.2"
+    unload "2.3.1"
+
 browser-stdout@1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/browser-stdout/-/browser-stdout-1.3.1.tgz#baa559ee14ced73452229bad7326467c61fabd60"
@@ -1947,6 +1967,11 @@ detect-file@^1.0.0:
   resolved "https://registry.yarnpkg.com/detect-file/-/detect-file-1.0.0.tgz#f0d66d03672a825cb1b73bdb3fe62310c8e552b7"
   integrity sha1-8NZtA2cqglyxtzvbP+YjEMjlUrc=
 
+detect-node@2.1.0, detect-node@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/detect-node/-/detect-node-2.1.0.tgz#c9c70775a49c3d03bc2c06d9a73be550f978f8b1"
+  integrity sha512-T0NIuQpnTvFDATNuHN5roPwSBG83rFsuO+MXXH9/3N1eFbn4wcPjttvjMLEPWJ0RGUYgQE7cGgS3tNxbqCGM7g==
+
 diff@5.0.0:
   version "5.0.0"
   resolved "https://registry.yarnpkg.com/diff/-/diff-5.0.0.tgz#7ed6ad76d859d030787ec35855f5b1daf31d852b"
@@ -2461,7 +2486,7 @@ eventemitter2@^6.4.3:
   resolved "https://registry.yarnpkg.com/eventemitter2/-/eventemitter2-6.4.4.tgz#aa96e8275c4dbeb017a5d0e03780c65612a1202b"
   integrity sha512-HLU3NDY6wARrLCEwyGKRBvuWYyvW6mHYv72SJJAH3iJN3a6eVUvkjFkcxah1bcTgGVBBrFdIopBJPhCQFMLyXw==
 
-eventemitter3@4.0.7, eventemitter3@^4.0.7:
+eventemitter3@4.0.7, eventemitter3@^4.0.4, eventemitter3@^4.0.7:
   version "4.0.7"
   resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-4.0.7.tgz#2de9b68f6528d5644ef5c59526a1b4a07306169f"
   integrity sha512-8guHBZCwKnFhYdHr2ysuRWErTwhoN2X8XELRlrRwpmfeY2jjuUN4taQMsULKUVo1K4DvZl+0pgfyoysHxvmvEw==
@@ -3752,6 +3777,14 @@ micromatch@^4.0.0, micromatch@^4.0.2:
     braces "^3.0.1"
     picomatch "^2.0.5"
 
+microtime@3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/microtime/-/microtime-3.0.0.tgz#d140914bde88aa89b4f9fd2a18620b435af0f39b"
+  integrity sha512-SirJr7ZL4ow2iWcb54bekS4aWyBQNVcEDBiwAz9D/sTgY59A+uE8UJU15cp5wyZmPBwg/3zf8lyCJ5NUe1nVlQ==
+  dependencies:
+    node-addon-api "^1.2.0"
+    node-gyp-build "^3.8.0"
+
 mime-db@1.44.0:
   version "1.44.0"
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.44.0.tgz#fa11c5eb0aca1334b4233cb4d52f10c5a6272f92"
@@ -3891,6 +3924,16 @@ next-tick@~1.0.0:
   resolved "https://registry.yarnpkg.com/next-tick/-/next-tick-1.0.0.tgz#ca86d1fe8828169b0120208e3dc8424b9db8342c"
   integrity sha1-yobR/ogoFpsBICCOPchCS524NCw=
 
+node-addon-api@^1.2.0:
+  version "1.7.2"
+  resolved "https://registry.yarnpkg.com/node-addon-api/-/node-addon-api-1.7.2.tgz#3df30b95720b53c24e59948b49532b662444f54d"
+  integrity sha512-ibPK3iA+vaY1eEjESkQkM0BbCqFOaZMiXRTtdB0u7b4djtY6JnsjvPdUHVMg6xQt3B8fpTTWHI9A+ADjM9frzg==
+
+node-gyp-build@^3.8.0:
+  version "3.9.0"
+  resolved "https://registry.yarnpkg.com/node-gyp-build/-/node-gyp-build-3.9.0.tgz#53a350187dd4d5276750da21605d1cb681d09e25"
+  integrity sha512-zLcTg6P4AbcHPq465ZMFNXx7XpKKJh+7kkN699NiQWisR2uWYOWNWqRHAmbnmKiL4e9aLSlmy5U7rEMUXV59+A==
+
 node-gyp-build@~3.7.0:
   version "3.7.0"
   resolved "https://registry.yarnpkg.com/node-gyp-build/-/node-gyp-build-3.7.0.tgz#daa77a4f547b9aed3e2aac779eaf151afd60ec8d"
@@ -4011,6 +4054,11 @@ object.values@^1.1.5:
     define-properties "^1.1.3"
     es-abstract "^1.19.1"
 
+oblivious-set@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/oblivious-set/-/oblivious-set-1.0.0.tgz#c8316f2c2fb6ff7b11b6158db3234c49f733c566"
+  integrity sha512-z+pI07qxo4c2CulUHCDf9lcqDlMSo72N/4rLUpRXf6fu+q8vjt8y0xS+Tlf8NTJDdTXHbdeO1n3MlbctwEoXZw==
+
 once@^1.3.0, once@^1.3.1, once@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
@@ -4042,6 +4090,11 @@ ospath@^1.2.2:
   resolved "https://registry.yarnpkg.com/ospath/-/ospath-1.2.2.tgz#1276639774a3f8ef2572f7fe4280e0ea4550c07b"
   integrity sha1-EnZjl3Sj+O8lcvf+QoDg6kVQwHs=
 
+p-finally@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
+  integrity sha1-P7z7FbiZpEEjs0ttzBi3JDNqLK4=
+
 p-limit@^1.1.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-1.3.0.tgz#b86bd5f0c25690911c7590fcbfc2010d54b3ccb8"
@@ -4098,6 +4151,21 @@ p-map@^4.0.0:
   dependencies:
     aggregate-error "^3.0.0"
 
+p-queue@6.6.2:
+  version "6.6.2"
+  resolved "https://registry.yarnpkg.com/p-queue/-/p-queue-6.6.2.tgz#2068a9dcf8e67dd0ec3e7a2bcb76810faa85e426"
+  integrity sha512-RwFpb72c/BhQLEXIZ5K2e+AhgNVmIejGlTgiB9MzZ0e93GRvqZ7uSi0dvRF7/XIXDeNkra2fNHBxTyPDGySpjQ==
+  dependencies:
+    eventemitter3 "^4.0.4"
+    p-timeout "^3.2.0"
+
+p-timeout@^3.2.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/p-timeout/-/p-timeout-3.2.0.tgz#c7e17abc971d2a7962ef83626b35d635acf23dfe"
+  integrity sha512-rhIwUycgwwKcP9yTOOFK/AKsAopjjCakVqLHePO3CC6Mir1Z99xT+R63jZxAT5lFZLa2inS5h+ZS2GvR99/FBg==
+  dependencies:
+    p-finally "^1.0.0"
+
 p-try@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/p-try/-/p-try-1.0.0.tgz#cbc79cdbaf8fd4228e13f621f2b1a237c1b207b3"
@@ -4756,6 +4824,11 @@ reflect-metadata@0.1.13:
   resolved "https://registry.yarnpkg.com/reflect-metadata/-/reflect-metadata-0.1.13.tgz#67ae3ca57c972a2aa1642b10fe363fe32d49dc08"
   integrity sha512-Ts1Y/anZELhSsjMcU605fU9RE4Oi3p5ORujwbIKXfWa+0Zxs510Qrmrce5/Jowq3cHSZSJqBjypxmHarc+vEWg==
 
+regenerator-runtime@^0.13.4:
+  version "0.13.9"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.9.tgz#8925742a98ffd90814988d7566ad30ca3b263b52"
+  integrity sha512-p3VT+cOEgxFsRRA9X4lkI1E+k2/CtnKtU4gcxyaCUreilL/vqI6CdZ3wxVUx3UOUg+gnUOQQcRI7BmSI656MYA==
+
 regexpp@^3.2.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-3.2.0.tgz#0425a2768d8f23bad70ca4b90461fa2f1213e1b2"
@@ -4841,7 +4914,7 @@ reusify@^1.0.4:
   resolved "https://registry.yarnpkg.com/reusify/-/reusify-1.0.4.tgz#90da382b1e126efc02146e90845a88db12925d76"
   integrity sha512-U9nH88a3fc/ekCF1l0/UP1IosiuIjyTh7hBvXVMHYgVcfGvt897Xguj2UOLDeI5BG2m7/uwyaLVT6fbtCwTyzw==
 
-rimraf@^3.0.0, rimraf@^3.0.2:
+rimraf@3.0.2, rimraf@^3.0.0, rimraf@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-3.0.2.tgz#f1a5402ba6220ad52cc1282bac1ae3aa49fd061a"
   integrity sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==
@@ -5559,6 +5632,14 @@ universalify@^2.0.0:
   resolved "https://registry.yarnpkg.com/universalify/-/universalify-2.0.0.tgz#75a4984efedc4b08975c5aeb73f530d02df25717"
   integrity sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ==
 
+unload@2.3.1:
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/unload/-/unload-2.3.1.tgz#9d16862d372a5ce5cb630ad1309c2fd6e35dacfe"
+  integrity sha512-MUZEiDqvAN9AIDRbbBnVYVvfcR6DrjCqeU2YQMmliFZl9uaBUjTkhuDQkBiyAy8ad5bx1TXVbqZ3gg7namsWjA==
+  dependencies:
+    "@babel/runtime" "^7.6.2"
+    detect-node "2.1.0"
+
 unquote@~1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/unquote/-/unquote-1.1.1.tgz#8fded7324ec6e88a0ff8b905e7c098cdc086d544"