diff --git a/server/collusic-be/.gitignore b/server/collusic-be/.gitignore
index 4791b467..3a02b827 100644
--- a/server/collusic-be/.gitignore
+++ b/server/collusic-be/.gitignore
@@ -59,4 +59,5 @@ gradle-app.setting
 
 ### Gradle Patch ###
 # Java heap dump
-*.hprof
\ No newline at end of file
+*.hprof
+**/out
\ No newline at end of file
diff --git a/server/collusic-be/src/main/java/com/collusic/collusicbe/global/auth/JWTAuthenticationFilter.java b/server/collusic-be/src/main/java/com/collusic/collusicbe/global/auth/JWTAuthenticationFilter.java
index 2243e0c6..65e04181 100644
--- a/server/collusic-be/src/main/java/com/collusic/collusicbe/global/auth/JWTAuthenticationFilter.java
+++ b/server/collusic-be/src/main/java/com/collusic/collusicbe/global/auth/JWTAuthenticationFilter.java
@@ -80,6 +80,7 @@ private void authenticateWithRefreshToken(HttpServletRequest request, HttpServle
             chain.doFilter(request, response);
         } catch (ExpiredTokenException | EntityNotFoundException | AbnormalAccessException e) {
             tokenService.deleteRefreshToken(refreshToken);
+            CookieUtils.expireCookie(response, "refreshToken");
             throw e;
         }
     }
diff --git a/server/collusic-be/src/main/java/com/collusic/collusicbe/global/util/JWTUtil.java b/server/collusic-be/src/main/java/com/collusic/collusicbe/global/util/JWTUtil.java
index 9b740cb5..008561a8 100644
--- a/server/collusic-be/src/main/java/com/collusic/collusicbe/global/util/JWTUtil.java
+++ b/server/collusic-be/src/main/java/com/collusic/collusicbe/global/util/JWTUtil.java
@@ -3,13 +3,18 @@
 import com.collusic.collusicbe.global.exception.jwt.ExpiredTokenException;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import io.jsonwebtoken.*;
-import lombok.extern.slf4j.Slf4j;
-
+import io.jsonwebtoken.Claims;
+import io.jsonwebtoken.ExpiredJwtException;
+import io.jsonwebtoken.Jwts;
+import io.jsonwebtoken.MalformedJwtException;
+import io.jsonwebtoken.SignatureAlgorithm;
+import io.jsonwebtoken.SignatureException;
+import io.jsonwebtoken.UnsupportedJwtException;
 import java.time.Instant;
 import java.util.Base64;
 import java.util.HashMap;
 import java.util.Map;
+import lombok.extern.slf4j.Slf4j;
 
 @Slf4j
 public class JWTUtil {
@@ -90,4 +95,5 @@ private static Map<String, Object> jwtHeaders() {
         headers.put("alg", SignatureAlgorithm.HS256);
         return headers;
     }
+
 }
\ No newline at end of file
diff --git a/server/collusic-be/src/main/java/com/collusic/collusicbe/service/S3Service.java b/server/collusic-be/src/main/java/com/collusic/collusicbe/service/S3Service.java
index 5ed3f652..7b134729 100644
--- a/server/collusic-be/src/main/java/com/collusic/collusicbe/service/S3Service.java
+++ b/server/collusic-be/src/main/java/com/collusic/collusicbe/service/S3Service.java
@@ -4,6 +4,11 @@
 import com.amazonaws.services.s3.model.CannedAccessControlList;
 import com.amazonaws.services.s3.model.ObjectMetadata;
 import com.amazonaws.services.s3.model.PutObjectRequest;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.time.LocalDateTime;
+import java.util.Optional;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
@@ -11,12 +16,6 @@
 import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.multipart.MultipartFile;
 
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.time.LocalDateTime;
-import java.util.Optional;
-
 @Slf4j
 @RequiredArgsConstructor
 @Service
@@ -45,7 +44,7 @@ public String upload(String nickname, @ModelAttribute MultipartFile multipartFil
         objectMetadata.setContentLength(multipartFile.getSize());
 
         s3Client.putObject(new PutObjectRequest(bucket, path.toString(), multipartFile.getInputStream(), objectMetadata)
-                .withCannedAcl(CannedAccessControlList.PublicRead));
+                                   .withCannedAcl(CannedAccessControlList.PublicRead));
 
         return cloudFrontDomain + path;
     }
@@ -109,8 +108,9 @@ public String uploadAudioFile(MultipartFile audioFile) throws IOException {
         objectMetadata.setContentLength(audioFile.getSize());
 
         s3Client.putObject(new PutObjectRequest(bucket, path.toString(), audioFile.getInputStream(), objectMetadata)
-                .withCannedAcl(CannedAccessControlList.PublicRead));
+                                   .withCannedAcl(CannedAccessControlList.PublicRead));
 
-        return cloudFrontDomain + path;
+        return cloudFrontDomain + "/" + path;
     }
+
 }
diff --git a/server/collusic-be/src/main/resources/application-dev_db.yml b/server/collusic-be/src/main/resources/application-dev_db.yml
index 859a4f4c..db789f11 100644
--- a/server/collusic-be/src/main/resources/application-dev_db.yml
+++ b/server/collusic-be/src/main/resources/application-dev_db.yml
@@ -1,9 +1,9 @@
 spring:
   datasource:
     driver-class-name: org.h2.Driver
-    url: jdbc:h2:mem:testdb;MODE=MYSQL
-    username: sa
-    password:
+    url: ENC(gnyYY2my5ZaFbvuc1ShsFN8N/6HyTS1sQ5UD+qe72zTg/xZCwIDJsttUCG56/ZZfmIRoFEy6c0gJgFE1FhmB9lYNO9nGF2bf8F75TJqccuicBum0mkyqp30RmK7tC4VoKmHw97c6MRAyx3Iv7LagNw==)
+    username: ENC(mf26xrSdlsDGLOp2uRVtYQ==)
+    password: ENC(B9/bakG1kuaw3NeCNI4dq6K/zkFiyO7uSWx6IR7jUQA=)
 
   jpa:
     show-sql: true
diff --git a/server/collusic-be/src/main/resources/application-prod_db.yml b/server/collusic-be/src/main/resources/application-prod_db.yml
index 6a473cd1..856dfa29 100644
--- a/server/collusic-be/src/main/resources/application-prod_db.yml
+++ b/server/collusic-be/src/main/resources/application-prod_db.yml
@@ -1,7 +1,7 @@
 spring:
   datasource:
     driver-class-name: com.mysql.cj.jdbc.Driver
-    url: ENC(0UN3QoywTt1aetAUuH2wBmNQ81GfewuEflb08Q7KfEv+AZ82o3C65RruLLWFtOemgsLQ/+xmqmv/O45y/NrUTDv/hOYG+9lC6/4w/TQ6H778gFuUKVxYyh9/k6egITMTRkfcW/VDeJJfWh+KVMBSyAlmrFZRo7nFnsZCjuXRG9W1d2SkNqJJ9Ik044jnVPv2)
+    url: ENC(UGndU3lx2AdAtuUBkeDqoZNFWNVtiLKgCb4VNNobbK9khWEsKypyQgRfyc5gNbyWjCPYowzsLH3b+S4W5b8YR4AvNwmOkhFihe3+gXI4GgWHdjopECQldkFLaJBRR9HFl2Ir6fQydv6ENNImswxwCaBuAYBQJK9AyW1/l0PXE3ETuM+MR9fVj2u8lZdeYntG)
     username: ENC(mf26xrSdlsDGLOp2uRVtYQ==)
     password: ENC(B9/bakG1kuaw3NeCNI4dq6K/zkFiyO7uSWx6IR7jUQA=)
 
diff --git a/server/collusic-be/src/test/java/com/collusic/collusicbe/config/JasyptTest.java b/server/collusic-be/src/test/java/com/collusic/collusicbe/config/JasyptTest.java
index 50963d23..b9ee83bc 100644
--- a/server/collusic-be/src/test/java/com/collusic/collusicbe/config/JasyptTest.java
+++ b/server/collusic-be/src/test/java/com/collusic/collusicbe/config/JasyptTest.java
@@ -39,7 +39,6 @@ public void setUp() {
     public void decryptTest() {
 
         String decryptedText = jasyptStringEncryptor.decrypt(defaultEncryptedText);
-
         assertThat(decryptedText).isEqualTo(defaultRawText);
     }