diff --git a/.gitmodules b/.gitmodules
index 04b28663..f94ca63c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,9 +1,6 @@
 [submodule "devenv/sql"]
 	path = devenv/sql
 	url = git@github.com:makevook/vook-sql.git
-[submodule "api/src/test/resources/migrate/sql"]
-	path = api/src/test/resources/migrate/sql
-	url = git@github.com:makevook/vook-sql.git
 [submodule "server/api/src/test/resources/migrate/sql"]
 	path = server/api/src/test/resources/migrate/sql
 	url = git@github.com:makevook/vook-sql.git
diff --git a/server/api/src/main/java/vook/server/api/web/common/auth/jwt/JWTFilter.java b/server/api/src/main/java/vook/server/api/web/common/auth/jwt/JWTFilter.java
index 9a7cc297..655f237b 100644
--- a/server/api/src/main/java/vook/server/api/web/common/auth/jwt/JWTFilter.java
+++ b/server/api/src/main/java/vook/server/api/web/common/auth/jwt/JWTFilter.java
@@ -35,7 +35,7 @@ protected void doFilterInternal(HttpServletRequest request, HttpServletResponse
         try {
             oAuth2User = VookLoginUser.of(tokenService.validateAndGetUid(token));
         } catch (Exception e) {
-            log.error("JWT validation failed", e);
+            log.debug("JWT validation failed", e);
             response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
             return;
         }
diff --git a/server/api/src/main/java/vook/server/api/web/common/auth/oauth2/VookOAuth2UserService.java b/server/api/src/main/java/vook/server/api/web/common/auth/oauth2/VookOAuth2UserService.java
index dae1543f..e32c75f1 100644
--- a/server/api/src/main/java/vook/server/api/web/common/auth/oauth2/VookOAuth2UserService.java
+++ b/server/api/src/main/java/vook/server/api/web/common/auth/oauth2/VookOAuth2UserService.java
@@ -24,12 +24,12 @@ public class VookOAuth2UserService extends DefaultOAuth2UserService {
     @Override
     public OAuth2User loadUser(OAuth2UserRequest userRequest) throws OAuth2AuthenticationException {
         OAuth2User oAuth2User = super.loadUser(userRequest);
-        log.info("OAuth2User: {}", oAuth2User);
+        log.debug("OAuth2User: {}", oAuth2User);
 
         String registrationId = userRequest.getClientRegistration().getRegistrationId();
         OAuth2Response oAuth2Response = toOAuth2Response(registrationId, oAuth2User);
         if (oAuth2Response == null) {
-            log.info("Unsupported registrationId: {}", registrationId);
+            log.warn("Unsupported registrationId: {}", registrationId);
             return null;
         }
 
diff --git a/server/api/src/main/java/vook/server/api/web/common/response/GlobalRestControllerAdvice.java b/server/api/src/main/java/vook/server/api/web/common/response/GlobalRestControllerAdvice.java
index 5da8cd2c..2658b9a3 100644
--- a/server/api/src/main/java/vook/server/api/web/common/response/GlobalRestControllerAdvice.java
+++ b/server/api/src/main/java/vook/server/api/web/common/response/GlobalRestControllerAdvice.java
@@ -14,7 +14,7 @@ public class GlobalRestControllerAdvice {
 
     @ExceptionHandler(AppException.class)
     public ResponseEntity<?> handleAppException(AppException e) {
-        log.error(e.getMessage(), e);
+        log.debug(e.getMessage(), e);
         String contents = e.getClass().getSimpleName().replace("Exception", "");
         CommonApiException badRequest = CommonApiException.badRequest(ApiResponseCode.BadRequest.VIOLATION_BUSINESS_RULE, e, contents);
         return ResponseEntity.status(badRequest.statusCode()).body(badRequest.response());
@@ -22,7 +22,7 @@ public ResponseEntity<?> handleAppException(AppException e) {
 
     @ExceptionHandler(CommonApiException.class)
     public ResponseEntity<?> handleCommonApiException(CommonApiException e) {
-        log.error(e.getMessage(), e);
+        log.debug(e.getMessage(), e);
         return ResponseEntity.status(e.statusCode()).body(e.response());
     }
 
diff --git a/server/api/src/main/resources/application-local.yml b/server/api/src/main/resources/application-local.yml
index 6ddb864e..c1e98c4f 100644
--- a/server/api/src/main/resources/application-local.yml
+++ b/server/api/src/main/resources/application-local.yml
@@ -40,5 +40,4 @@ service:
     accessTokenExpiredMinute: 30 # 30 minutes
     refreshTokenExpiredMinute: 10080 # 60 * 24 * 7 == 1 week
 logging:
-  level:
-    vook.server.api: DEBUG
+  config: classpath:logback.xml
diff --git a/server/api/src/main/resources/logback.xml b/server/api/src/main/resources/logback.xml
new file mode 100644
index 00000000..2d05c206
--- /dev/null
+++ b/server/api/src/main/resources/logback.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
+    <include resource="org/springframework/boot/logging/logback/console-appender.xml" />
+
+    <root level="INFO">
+        <appender-ref ref="CONSOLE" />
+    </root>
+
+    <logger name="vook.server.api" level="DEBUG" />
+    <logger name="org.hibernate.orm.jdbc" level="TRACE" />
+
+</configuration>