diff --git a/.github/workflows/decrypt.sh b/.github/workflows/decrypt.sh
index d12d1fc5..77ec579e 100644
--- a/.github/workflows/decrypt.sh
+++ b/.github/workflows/decrypt.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
-gpg --batch --yes --decrypt --passphrase "$GPG_PASSPHRASE" --output src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-5ba04dfc12.json src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-5ba04dfc12.json.gpg
+gpg --batch --yes --decrypt --passphrase "$GPG_PASSPHRASE" --output src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-ae6a2df931.json src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-ae6a2df931.json.gpg
 
-if [ -f src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-5ba04dfc12.json ]; then
+if [ -f src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-ae6a2df931.json ]; then
   echo "Decryption Success!"
-fi
\ No newline at end of file
+fi
diff --git a/build.gradle b/build.gradle
index 31cd488c..eafaebd3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -85,7 +85,7 @@ dependencies {
     implementation 'org.jsoup:jsoup:1.14.3'
 
     // Firebase
-    implementation 'com.google.firebase:firebase-admin:8.1.0'
+    implementation 'com.google.firebase:firebase-admin:9.3.0'
 
     // RestDocs
     asciidoctorExtensions 'org.springframework.restdocs:spring-restdocs-asciidoctor'
diff --git a/src/main/java/com/kustacks/kuring/config/FirebaseConfig.java b/src/main/java/com/kustacks/kuring/config/FirebaseConfig.java
index 127b580f..34b2c230 100644
--- a/src/main/java/com/kustacks/kuring/config/FirebaseConfig.java
+++ b/src/main/java/com/kustacks/kuring/config/FirebaseConfig.java
@@ -22,12 +22,15 @@ FirebaseMessaging firebaseMessaging(FirebaseApp firebaseApp) {
 
     @Bean
     FirebaseApp firebaseApp(@Value("${firebase.file-path}") String filePath) throws IOException {
-        FirebaseOptions options = FirebaseOptions.builder()
-                .setCredentials(GoogleCredentials.fromStream(new ClassPathResource(filePath).getInputStream()))
+        GoogleCredentials googleCredentials = GoogleCredentials
+                .fromStream(new ClassPathResource(filePath).getInputStream());
+
+        FirebaseOptions firebaseOptions = FirebaseOptions.builder()
+                .setCredentials(googleCredentials)
                 .build();
 
-        if(FirebaseApp.getApps().isEmpty()) {
-            return FirebaseApp.initializeApp(options);
+        if (FirebaseApp.getApps().isEmpty()) {
+            return FirebaseApp.initializeApp(firebaseOptions);
         }
 
         return FirebaseApp.getInstance();
diff --git a/src/main/resources/application-dev.yml b/src/main/resources/application-dev.yml
index 55cea450..a74a32d1 100644
--- a/src/main/resources/application-dev.yml
+++ b/src/main/resources/application-dev.yml
@@ -144,7 +144,7 @@ auth:
   login-url: https://kuis.konkuk.ac.kr/Login/login.do
 
 firebase:
-  file-path: third/ku-stack-firebase-adminsdk-87nwq-5ba04dfc12.json
+  file-path: third/ku-stack-firebase-adminsdk-87nwq-ae6a2df931.json
 
 admin:
   password: ${ADMIN_PASSWORD}
diff --git a/src/main/resources/application-local.yml b/src/main/resources/application-local.yml
index 0db1bfc7..e429895d 100644
--- a/src/main/resources/application-local.yml
+++ b/src/main/resources/application-local.yml
@@ -147,7 +147,7 @@ auth:
   login-url: https://kuis.konkuk.ac.kr/Login/login.do
 
 firebase:
-  file-path: third/ku-stack-firebase-adminsdk-87nwq-5ba04dfc12.json
+  file-path: third/ku-stack-firebase-adminsdk-87nwq-ae6a2df931.json
 
 admin:
   password: ${ADMIN_PASSWORD}
diff --git a/src/main/resources/application-prod.yml b/src/main/resources/application-prod.yml
index 253e4906..8137f084 100644
--- a/src/main/resources/application-prod.yml
+++ b/src/main/resources/application-prod.yml
@@ -104,7 +104,7 @@ auth:
   login-url: https://kuis.konkuk.ac.kr/Login/login.do
 
 firebase:
-  file-path: third/ku-stack-firebase-adminsdk-87nwq-5ba04dfc12.json
+  file-path: third/ku-stack-firebase-adminsdk-87nwq-ae6a2df931.json
 
 admin:
   password: ${ADMIN_PASSWORD}
diff --git a/src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-5ba04dfc12.json.gpg b/src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-5ba04dfc12.json.gpg
deleted file mode 100644
index 614c710a..00000000
Binary files a/src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-5ba04dfc12.json.gpg and /dev/null differ
diff --git a/src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-ae6a2df931.json.gpg b/src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-ae6a2df931.json.gpg
new file mode 100644
index 00000000..62cc3780
Binary files /dev/null and b/src/main/resources/third/ku-stack-firebase-adminsdk-87nwq-ae6a2df931.json.gpg differ
diff --git a/src/test/resources/application-test.yml b/src/test/resources/application-test.yml
index ca921743..6b0fb912 100644
--- a/src/test/resources/application-test.yml
+++ b/src/test/resources/application-test.yml
@@ -89,7 +89,7 @@ server:
     environment: test
 
 firebase:
-  file-path: third/ku-stack-firebase-adminsdk-87nwq-5ba04dfc12.json
+  file-path: third/ku-stack-firebase-adminsdk-87nwq-ae6a2df931.json
 
 admin:
   id: admin@email.com