diff --git a/README.md b/README.md
index 4e2af9a..3b29fee 100644
--- a/README.md
+++ b/README.md
@@ -31,8 +31,8 @@ public AuthenticationManager authenticationManager(AuthenticationConfiguration a
 
 # Profile
 Set ```application.yml``` to use ```.dev.env``` file
-```
+```yaml
 spring:
   config:
     import: optional:file:.dev.env[.properties]
-```
+```
\ No newline at end of file
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index 5ecc497..a4d1878 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -5,8 +5,10 @@ spring:
     import: optional:file:.dev.env[.properties]
   # Database
   datasource:
-    driver-class-name: org.postgresql.Driver
-    url: jdbc:postgresql://localhost:5432/${DB_NAME}
+#    driver-class-name: org.postgresql.Driver
+    driver-class-name: net.sf.log4jdbc.sql.jdbcapi.DriverSpy # log4jdbc 사용을 위한 driver
+#    url: jdbc:postgresql://localhost:5432/${DB_NAME}
+    url: jdbc:log4jdbc:postgresql://localhost:5432/${DB_NAME} # log4jdbc 사용을 위한 'log4jdbc:' 추가
     username: postgres
     password: ${DB_PW}
   # jpa properties