diff --git a/src/main/kotlin/zip/cafe/security/jwt/JwtTokenProvider.kt b/src/main/kotlin/zip/cafe/security/jwt/JwtTokenProvider.kt
index f586f19..2362a55 100644
--- a/src/main/kotlin/zip/cafe/security/jwt/JwtTokenProvider.kt
+++ b/src/main/kotlin/zip/cafe/security/jwt/JwtTokenProvider.kt
@@ -37,7 +37,7 @@ class JwtTokenProvider(
         val claims = parseClaims(token)
         requireNotNull(claims) { "올바른 JWT 토큰이 아니라 값을 추출할 수 없습니다" }
         return try {
-            claims[MEMBER_ID_KEY, Long::class.java]
+            claims[MEMBER_ID_KEY, Number::class.java].toLong()
         } catch (e: java.lang.NumberFormatException) {
             throw IllegalArgumentException("올바른 JWT 토큰이 아니라 값을 추출할 수 없습니다")
         }
diff --git a/src/test/kotlin/zip/cafe/service/AuthServiceTest.kt b/src/test/kotlin/zip/cafe/service/AuthServiceTest.kt
index 3f961d9..4679495 100644
--- a/src/test/kotlin/zip/cafe/service/AuthServiceTest.kt
+++ b/src/test/kotlin/zip/cafe/service/AuthServiceTest.kt
@@ -6,14 +6,18 @@ import io.mockk.clearMocks
 import io.mockk.every
 import io.mockk.mockk
 import io.mockk.verify
+import zip.cafe.repository.MemberRepository
+import zip.cafe.repository.findOneById
 import zip.cafe.security.jwt.JwtTokenProvider
+import zip.cafe.seeds.createMember
 import zip.cafe.service.auth.AuthService
 import java.util.*
 
 class AuthServiceTest : FreeSpec({
 
     val jwtTokenProvider = mockk<JwtTokenProvider>(relaxed = true)
-    val authService = AuthService(jwtTokenProvider = jwtTokenProvider)
+    val memberRepository = mockk<MemberRepository>(relaxed = true)
+    val authService = AuthService(jwtTokenProvider = jwtTokenProvider, memberRepository = memberRepository)
     val tempJWTToken =
         "eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiIxIiwiaWF0IjoxNjUyMDExOTU0LCJleHAiOjE2ODM1NDc5NTR9.HeNl3BJdZuRrFT7Lhi9lHmCRIxPn5pxCWoIgDQONFFTIfA8NcTutGyqGfdyZ3JVtV8IYVVSf_SjLgMl3jFkvtQ"
 
@@ -21,9 +25,11 @@ class AuthServiceTest : FreeSpec({
         // given
         val memberId = 1L
         val nickname = "길동길동"
+        val member = createMember(id = memberId, nickname = nickname)
         val now = Date()
         // mock
         every { jwtTokenProvider.createToken(memberId, nickname = nickname, at = now) } returns tempJWTToken
+        every { memberRepository.findOneById(memberId) } returns member
         // when
         val generateToken = authService.generateToken(memberId, now)
         // then