diff --git a/adapters/out-persistence/src/main/kotlin/com/pokit/out/persistence/user/persist/UserEntity.kt b/adapters/out-persistence/src/main/kotlin/com/pokit/out/persistence/user/persist/UserEntity.kt
index 223fc59b..7e6ac978 100644
--- a/adapters/out-persistence/src/main/kotlin/com/pokit/out/persistence/user/persist/UserEntity.kt
+++ b/adapters/out-persistence/src/main/kotlin/com/pokit/out/persistence/user/persist/UserEntity.kt
@@ -17,12 +17,14 @@ class UserEntity(
     val email: String,
 
     @Column(name = "role")
+    @Enumerated(EnumType.STRING)
     val role: Role,
 
     @Column(name = "nickname")
     var nickname: String = email,
 
     @Column(name = "auth_platform")
+    @Enumerated(EnumType.STRING)
     val authPlatform: AuthPlatform,
 
     @Column(name = "deleted")
diff --git a/adapters/out-web/src/main/kotlin/com/pokit/auth/common/dto/GoogleUserResponse.kt b/adapters/out-web/src/main/kotlin/com/pokit/auth/common/dto/GoogleUserResponse.kt
new file mode 100644
index 00000000..96660de6
--- /dev/null
+++ b/adapters/out-web/src/main/kotlin/com/pokit/auth/common/dto/GoogleUserResponse.kt
@@ -0,0 +1,5 @@
+package com.pokit.auth.common.dto
+
+data class GoogleUserResponse(
+    val email: String
+)
diff --git a/adapters/out-web/src/main/kotlin/com/pokit/auth/common/support/GoogleFeignClient.kt b/adapters/out-web/src/main/kotlin/com/pokit/auth/common/support/GoogleFeignClient.kt
new file mode 100644
index 00000000..18366d63
--- /dev/null
+++ b/adapters/out-web/src/main/kotlin/com/pokit/auth/common/support/GoogleFeignClient.kt
@@ -0,0 +1,17 @@
+package com.pokit.auth.common.support
+
+import com.pokit.auth.common.config.OpenFeignConfig
+import com.pokit.auth.common.dto.GoogleUserResponse
+import org.springframework.cloud.openfeign.FeignClient
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RequestParam
+
+@FeignClient(
+    name = "googleClient",
+    url = "https://oauth2.googleapis.com",
+    configuration = [OpenFeignConfig::class]
+)
+interface GoogleFeignClient {
+    @GetMapping("/tokeninfo")
+    fun getUserInfo(@RequestParam("id_token") idToken: String): GoogleUserResponse
+}
diff --git a/adapters/out-web/src/main/kotlin/com/pokit/auth/impl/GoogleApiAdapter.kt b/adapters/out-web/src/main/kotlin/com/pokit/auth/impl/GoogleApiAdapter.kt
index 12640671..a2e8085d 100644
--- a/adapters/out-web/src/main/kotlin/com/pokit/auth/impl/GoogleApiAdapter.kt
+++ b/adapters/out-web/src/main/kotlin/com/pokit/auth/impl/GoogleApiAdapter.kt
@@ -1,19 +1,22 @@
 package com.pokit.auth.impl
 
-import com.google.firebase.auth.FirebaseAuth
+import com.pokit.auth.common.support.GoogleFeignClient
 import com.pokit.auth.port.out.GoogleApiClient
 import com.pokit.token.model.AuthPlatform
 import com.pokit.user.dto.UserInfo
+import io.github.oshai.kotlinlogging.KotlinLogging
 import org.springframework.stereotype.Component
 
 @Component
 class GoogleApiAdapter(
-    private val firebaseAuth: FirebaseAuth
+    private val googleFeignClient: GoogleFeignClient
 ) : GoogleApiClient {
-    override fun getUserInfo(authorizationCode: String): UserInfo {
-        val decodedToken = verifyIdToken(authorizationCode)
-        return UserInfo(decodedToken.email, AuthPlatform.GOOGLE) // 로그인 한 사용자의 이메일
-    }
+    override fun getUserInfo(idToken: String): UserInfo {
+        val response = googleFeignClient.getUserInfo(idToken)
 
-    private fun verifyIdToken(idToken: String) = firebaseAuth.verifyIdToken(idToken)
+        return UserInfo(
+            email = response.email,
+            authPlatform = AuthPlatform.GOOGLE
+        )
+    }
 }
diff --git a/application/src/main/kotlin/com/pokit/auth/port/out/GoogleApiClient.kt b/application/src/main/kotlin/com/pokit/auth/port/out/GoogleApiClient.kt
index 7ba66dcd..0f2b918a 100644
--- a/application/src/main/kotlin/com/pokit/auth/port/out/GoogleApiClient.kt
+++ b/application/src/main/kotlin/com/pokit/auth/port/out/GoogleApiClient.kt
@@ -3,5 +3,5 @@ package com.pokit.auth.port.out
 import com.pokit.user.dto.UserInfo
 
 interface GoogleApiClient {
-    fun getUserInfo(authorizationCode: String): UserInfo
+    fun getUserInfo(idToken: String): UserInfo
 }
diff --git a/application/src/main/kotlin/com/pokit/auth/port/service/AuthService.kt b/application/src/main/kotlin/com/pokit/auth/port/service/AuthService.kt
index cab474fd..70c1fb7b 100644
--- a/application/src/main/kotlin/com/pokit/auth/port/service/AuthService.kt
+++ b/application/src/main/kotlin/com/pokit/auth/port/service/AuthService.kt
@@ -27,6 +27,7 @@ class AuthService(
     private val userPort: UserPort,
     private val contentPort: ContentPort
 ) : AuthUseCase {
+    @Transactional
     override fun signIn(request: SignInRequest): Token {
         val platformType = AuthPlatform.of(request.authPlatform)