diff --git a/.gitignore b/.gitignore
index 7d20223..f878417 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,9 +5,7 @@ build/
 !**/src/main/**/build/
 !**/**/build/
 !**/src/test/**/build/
-*/Api/build
-*/Common/build
-*/Search/build
+**/build/
 
 ### STS ###
 .apt_generated
diff --git a/Api/build.gradle b/Api/build.gradle
index ac2b9ac..3122563 100644
--- a/Api/build.gradle
+++ b/Api/build.gradle
@@ -16,6 +16,8 @@ dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
     implementation project(':Common')
     implementation project(':Domain')
+    implementation 'org.springframework.boot:spring-boot-starter-security'
+    testImplementation 'org.springframework.security:spring-security-test'
     runtimeOnly 'com.mysql:mysql-connector-j'
     testImplementation platform('org.junit:junit-bom:5.9.1')
     testImplementation 'org.junit.jupiter:junit-jupiter'
diff --git a/Api/build/classes/java/main/org/momo/MomoApiApplication.class b/Api/build/classes/java/main/org/momo/MomoApiApplication.class
deleted file mode 100644
index 52ef0e8..0000000
Binary files a/Api/build/classes/java/main/org/momo/MomoApiApplication.class and /dev/null differ
diff --git a/Api/build/tmp/compileJava/previous-compilation-data.bin b/Api/build/tmp/compileJava/previous-compilation-data.bin
deleted file mode 100644
index 8cc0d98..0000000
Binary files a/Api/build/tmp/compileJava/previous-compilation-data.bin and /dev/null differ
diff --git a/Api/src/main/resources/application.yml b/Api/src/main/resources/application.yml
index 7d91f09..570905d 100644
--- a/Api/src/main/resources/application.yml
+++ b/Api/src/main/resources/application.yml
@@ -11,4 +11,4 @@ spring:
       hibernate:
         format_sql: true
         use_sql_comments: true
-#        show_sql: true
\ No newline at end of file
+#        show_sql: true
diff --git a/Auth/build.gradle b/Auth/build.gradle
index 0a72543..8bd42aa 100644
--- a/Auth/build.gradle
+++ b/Auth/build.gradle
@@ -1,5 +1,6 @@
 plugins {
     id 'java'
+    id 'java-library'
 }
 
 group = 'org.momo'
@@ -13,13 +14,15 @@ bootJar { enabled = false }
 jar { enabled = true }
 
 dependencies {
-    implementation 'org.springframework.boot:spring-boot-starter-security'
+    api project(':Common')
+    implementation project(':Domain')
+    //implementation 'org.springframework.boot:spring-boot-starter-security'
     testImplementation platform('org.junit:junit-bom:5.9.1')
     testImplementation 'org.junit.jupiter:junit-jupiter'
-    testImplementation 'org.springframework.security:spring-security-test'
+    //testImplementation 'org.springframework.security:spring-security-test'
 
 }
 
 test {
     useJUnitPlatform()
-}
\ No newline at end of file
+}
diff --git a/Auth/build/classes/java/main/org/momo/MomoAuthApplication.class b/Auth/build/classes/java/main/org/momo/MomoAuthApplication.class
deleted file mode 100644
index 4799128..0000000
Binary files a/Auth/build/classes/java/main/org/momo/MomoAuthApplication.class and /dev/null differ
diff --git a/Auth/build/tmp/compileJava/previous-compilation-data.bin b/Auth/build/tmp/compileJava/previous-compilation-data.bin
deleted file mode 100644
index 846ad74..0000000
Binary files a/Auth/build/tmp/compileJava/previous-compilation-data.bin and /dev/null differ
diff --git a/Auth/src/main/java/org/momo/security/filter/JwtFilter.java b/Auth/src/main/java/org/momo/security/filter/JwtFilter.java
index 7c4509f..30296d7 100644
--- a/Auth/src/main/java/org/momo/security/filter/JwtFilter.java
+++ b/Auth/src/main/java/org/momo/security/filter/JwtFilter.java
@@ -44,6 +44,7 @@ protected void doFilterInternal(HttpServletRequest request, HttpServletResponse
             Authentication authentication = new UsernamePasswordAuthenticationToken(principalDetails, null, principalDetails.getAuthorities());
             SecurityContextHolder.getContext().setAuthentication(authentication);
         }catch (JwtExpiredHandler e){
+            response.setContentType("application/json");
             BaseResponseDto<Object> baseResponseDto = BaseResponseDto.onFailure(
                     ErrorStatus.JWT_ACCESS_TOKEN_EXPIRED.getCode(),
                     ErrorStatus.JWT_ACCESS_TOKEN_EXPIRED.getMessage(),
@@ -53,6 +54,7 @@ protected void doFilterInternal(HttpServletRequest request, HttpServletResponse
             objectMapper.writeValue(response.getOutputStream(),baseResponseDto);
             return;
         }catch (JwtInvalidHandler e){
+            response.setContentType("application/json");
             BaseResponseDto<Object> baseResponseDto = BaseResponseDto.onFailure(
                     ErrorStatus.JWT_TOKEN_INVALID.getCode(),
                     ErrorStatus.JWT_TOKEN_INVALID.getMessage(),
diff --git a/Common/build.gradle b/Common/build.gradle
index 7ff849d..bcd2130 100644
--- a/Common/build.gradle
+++ b/Common/build.gradle
@@ -1,21 +1,26 @@
 plugins {
     id 'java'
+    id 'java-library'
 }
 
-group = 'org.momo'
-version = '0.0.1-SNAPSHOT'
+bootJar { enabled = false }
+jar { enabled = true }
 
 repositories {
     mavenCentral()
 }
 
 dependencies {
-    // Swagger
+    api group: 'io.jsonwebtoken', name: 'jjwt-api', version: '0.12.3'
     implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.0.2'
+    api 'org.springframework.boot:spring-boot-starter-security'
+    testImplementation 'org.springframework.security:spring-security-test'
+    runtimeOnly group: 'io.jsonwebtoken', name: 'jjwt-impl', version: '0.12.3'
+    runtimeOnly group: 'io.jsonwebtoken', name: 'jjwt-jackson', version: '0.12.3'
     testImplementation platform('org.junit:junit-bom:5.9.1')
     testImplementation 'org.junit.jupiter:junit-jupiter'
 }
 
 test {
     useJUnitPlatform()
-}
\ No newline at end of file
+}
diff --git a/Common/build/classes/java/main/org/momo/MomoCommonApplication.class b/Common/build/classes/java/main/org/momo/MomoCommonApplication.class
deleted file mode 100644
index ba08959..0000000
Binary files a/Common/build/classes/java/main/org/momo/MomoCommonApplication.class and /dev/null differ
diff --git a/Common/build/tmp/compileJava/previous-compilation-data.bin b/Common/build/tmp/compileJava/previous-compilation-data.bin
deleted file mode 100644
index cd306d7..0000000
Binary files a/Common/build/tmp/compileJava/previous-compilation-data.bin and /dev/null differ
diff --git a/Common/build/tmp/jar/MANIFEST.MF b/Common/build/tmp/jar/MANIFEST.MF
deleted file mode 100644
index 58630c0..0000000
--- a/Common/build/tmp/jar/MANIFEST.MF
+++ /dev/null
@@ -1,2 +0,0 @@
-Manifest-Version: 1.0
-
diff --git a/Common/src/main/java/org/momo/MomoCommonApplication.java b/Common/src/main/java/org/momo/MomoCommonApplication.java
new file mode 100644
index 0000000..416a500
--- /dev/null
+++ b/Common/src/main/java/org/momo/MomoCommonApplication.java
@@ -0,0 +1,11 @@
+package org.momo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class MomoCommonApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(MomoCommonApplication.class,args);
+    }
+}
diff --git a/Common/src/main/java/org/momo/common/status/ErrorStatus.java b/Common/src/main/java/org/momo/common/status/ErrorStatus.java
index e51b565..ed76f48 100644
--- a/Common/src/main/java/org/momo/common/status/ErrorStatus.java
+++ b/Common/src/main/java/org/momo/common/status/ErrorStatus.java
@@ -18,6 +18,7 @@ public enum ErrorStatus implements BaseErrorCode {
 
     // 멤버 관련 에러
     MEMBER_NOT_FOUND(HttpStatus.NOT_FOUND, 401, "사용자가 없습니다."),
+    PASSWORD_NOT_MATCH(HttpStatus.UNAUTHORIZED, 401, "비밀번호가 일치하지 않습니다."),
     USER_NOT_EXISTS(HttpStatus.NOT_FOUND, 404, "존재하지 않는 사용자입니다."),
     NICKNAME_EXISTS(HttpStatus.CONFLICT, 409, "이미 존재하는 닉네임입니다."),
 
diff --git a/Domain/build.gradle b/Domain/build.gradle
index abd9c58..3759baf 100644
--- a/Domain/build.gradle
+++ b/Domain/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'java'
+    id 'java-library'
 }
 
 group = 'org.momo'
@@ -11,11 +11,12 @@ repositories {
 
 dependencies {
     implementation project(':Common')
-    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    api 'org.springframework.boot:spring-boot-starter-data-jpa'
     testImplementation platform('org.junit:junit-bom:5.9.1')
     testImplementation 'org.junit.jupiter:junit-jupiter'
+    runtimeOnly 'com.mysql:mysql-connector-j'
 }
 
 test {
     useJUnitPlatform()
-}
\ No newline at end of file
+}
diff --git a/Domain/build/classes/java/main/org/momo/Member/Member.class b/Domain/build/classes/java/main/org/momo/Member/Member.class
deleted file mode 100644
index 146b9be..0000000
Binary files a/Domain/build/classes/java/main/org/momo/Member/Member.class and /dev/null differ
diff --git a/Domain/build/classes/java/main/org/momo/MomoDomainApplication.class b/Domain/build/classes/java/main/org/momo/MomoDomainApplication.class
deleted file mode 100644
index e7eec2d..0000000
Binary files a/Domain/build/classes/java/main/org/momo/MomoDomainApplication.class and /dev/null differ
diff --git a/Domain/build/tmp/compileJava/previous-compilation-data.bin b/Domain/build/tmp/compileJava/previous-compilation-data.bin
deleted file mode 100644
index 7921eda..0000000
Binary files a/Domain/build/tmp/compileJava/previous-compilation-data.bin and /dev/null differ
diff --git a/Domain/build/tmp/jar/MANIFEST.MF b/Domain/build/tmp/jar/MANIFEST.MF
deleted file mode 100644
index 58630c0..0000000
--- a/Domain/build/tmp/jar/MANIFEST.MF
+++ /dev/null
@@ -1,2 +0,0 @@
-Manifest-Version: 1.0
-
diff --git a/Domain/src/main/java/org/momo/MomoDomainApplication.java b/Domain/src/main/java/org/momo/MomoDomainApplication.java
index 072b697..73771e2 100644
--- a/Domain/src/main/java/org/momo/MomoDomainApplication.java
+++ b/Domain/src/main/java/org/momo/MomoDomainApplication.java
@@ -1,7 +1,15 @@
 package org.momo;
 
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
+
+@SpringBootApplication
+@EnableJpaAuditing
 public class MomoDomainApplication {
     public static void main(String[] args) {
-        System.out.println("Hello world!");
+        SpringApplication.run(MomoDomainApplication.class, args);
     }
-}
\ No newline at end of file
+}
+
+
diff --git a/Domain/src/main/resources/application.yml b/Domain/src/main/resources/application.yml
index e5d8a68..570905d 100644
--- a/Domain/src/main/resources/application.yml
+++ b/Domain/src/main/resources/application.yml
@@ -2,8 +2,8 @@ spring:
   datasource:
     driver-class-name: com.mysql.cj.jdbc.Driver
     url: jdbc:mysql://localhost:3306/momo_dev?serverTimezone=UTC&characterEncoding=UTF-8
-    username: root
-    password: 12345678
+    username: ${DB_USERNAME}
+    password: ${DB_PASS}
   jpa:
     hibernate:
       ddl-auto: update
diff --git a/build.gradle b/build.gradle
index 19657fd..133f647 100644
--- a/build.gradle
+++ b/build.gradle
@@ -26,14 +26,11 @@ subprojects {
 		apply plugin: 'java'
 		apply plugin: 'org.springframework.boot'
 		apply plugin: 'io.spring.dependency-management'
-		//implementation 'org.springframework.boot:spring-boot-starter-batch'
-		//implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
 		implementation 'org.springframework.boot:spring-boot-starter-web'
 		compileOnly 'org.projectlombok:lombok'
-		//runtimeOnly 'com.mysql:mysql-connector-j'
 		annotationProcessor 'org.projectlombok:lombok'
-		//testImplementation 'org.springframework.boot:spring-boot-starter-test'
-		//testImplementation 'org.springframework.batch:spring-batch-test'
+		testImplementation 'org.springframework.boot:spring-boot-starter-test'
+		testImplementation 'org.springframework.batch:spring-batch-test'
 	}
 
 	tasks.named('test') {