diff --git a/dictation_server/package-lock.json b/dictation_server/package-lock.json
index 5e9a46e..f98b5f0 100644
--- a/dictation_server/package-lock.json
+++ b/dictation_server/package-lock.json
@@ -3021,9 +3021,9 @@
       "dev": true
     },
     "node_modules/@types/node": {
-      "version": "16.18.21",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-16.18.21.tgz",
-      "integrity": "sha512-TassPGd0AEZWA10qcNnXnSNwHlLfSth8XwUaWc3gTSDmBz/rKb613Qw5qRf6o2fdRBrLbsgeC9PMZshobkuUqg=="
+      "version": "16.18.38",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-16.18.38.tgz",
+      "integrity": "sha512-6sfo1qTulpVbkxECP+AVrHV9OoJqhzCsfTNp5NIG+enM4HyM3HvZCO798WShIXBN0+QtDIcutJCjsVYnQP5rIQ=="
     },
     "node_modules/@types/node-fetch": {
       "version": "2.6.3",
diff --git a/dictation_server/src/common/jwt/jwt.ts b/dictation_server/src/common/jwt/jwt.ts
index 3059ddb..f50f01d 100644
--- a/dictation_server/src/common/jwt/jwt.ts
+++ b/dictation_server/src/common/jwt/jwt.ts
@@ -132,7 +132,7 @@ export const getPrivateKey = (configService: ConfigService): string => {
   return (
     // 開発環境用に改行コードを置換する
     // 本番環境では\\nが含まれないため、置換が行われない想定
-    configService.get<string>('JWT_PRIVATE_KEY')?.replace('\\n', '\n') ?? ''
+    configService.get<string>('JWT_PRIVATE_KEY')?.replace(/\\n/g, '\n') ?? ''
   );
 };
 
@@ -140,6 +140,6 @@ export const getPublicKey = (configService: ConfigService): string => {
   return (
     // 開発環境用に改行コードを置換する
     // 本番環境では\\nが含まれないため、置換が行われない想定
-    configService.get<string>('JWT_PUBLIC_KEY')?.replace('\\n', '\n') ?? ''
+    configService.get<string>('JWT_PUBLIC_KEY')?.replace(/\\n/g, '\n') ?? ''
   );
 };