diff --git a/src/boot/index.ts b/src/boot/index.ts
index 7380c4484d..602f6b0e48 100644
--- a/src/boot/index.ts
+++ b/src/boot/index.ts
@@ -66,7 +66,9 @@ if (!program.quiet) {
 
 // Display detail of uncaught exception
 process.on('uncaughtException', err => {
-	logger.error(err);
+	try {
+		logger.error(err);
+	} catch { }
 });
 
 // Dying away...
diff --git a/src/services/logger.ts b/src/services/logger.ts
index eb2b257dde..c7483d3faa 100644
--- a/src/services/logger.ts
+++ b/src/services/logger.ts
@@ -94,7 +94,7 @@ export default class Logger {
 					level === 'info' ? this.syslogClient.info :
 					null as never;
 
-				send.bind(this.syslogClient)(message);
+				send.bind(this.syslogClient)(message).catch(() => {});
 			} else {
 				const Logs = getRepository(Log);
 				Logs.insert({
@@ -106,7 +106,7 @@ export default class Logger {
 					level: level,
 					message: message.substr(0, 1000), // 1024を超えるとログが挿入できずエラーになり無限ループする
 					data: data,
-				} as Log);
+				} as Log).catch(() => {});
 			}
 		}
 	}
@@ -116,8 +116,10 @@ export default class Logger {
 			data = data || {};
 			data.e = x;
 			this.log('error', x.toString(), data, important);
+		} else if (typeof x === 'object') {
+			this.log('error', `${(x as any).message || (x as any).name || x}`, data, important);
 		} else {
-			this.log('error', x, data, important);
+			this.log('error', `${x}`, data, important);
 		}
 	}
 
diff --git a/yarn.lock b/yarn.lock
index a2e691da4a..b8edcb8501 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11351,14 +11351,14 @@ xtend@^4.0.0, xtend@~4.0.0, xtend@~4.0.1:
   integrity sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==
 
 y18n@^3.2.1:
-  version "3.2.1"
-  resolved "https://registry.yarnpkg.com/y18n/-/y18n-3.2.1.tgz#6d15fba884c08679c0d77e88e7759e811e07fa41"
-  integrity sha1-bRX7qITAhnnA136I53WegR4H+kE=
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/y18n/-/y18n-3.2.2.tgz#85c901bd6470ce71fc4bb723ad209b70f7f28696"
+  integrity sha512-uGZHXkHnhF0XeeAPgnKfPv1bgKAYyVvmNL1xlKsPYZPaIHxGti2hHqvOCQv71XMsLxu1QjergkqogUnms5D3YQ==
 
 y18n@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/y18n/-/y18n-4.0.0.tgz#95ef94f85ecc81d007c264e190a120f0a3c8566b"
-  integrity sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/y18n/-/y18n-4.0.1.tgz#8db2b83c31c5d75099bb890b23f3094891e247d4"
+  integrity sha512-wNcy4NvjMYL8gogWWYAO7ZFWFfHcbdbE57tZO8e4cbpj8tfUcwrwqSl3ad8HxpYWCdXcJUCeKKZS62Av1affwQ==
 
 y18n@^5.0.5:
   version "5.0.5"