diff --git a/backend/apigateway/build.gradle b/backend/apigateway/build.gradle
index d58a9e5..0e94d63 100644
--- a/backend/apigateway/build.gradle
+++ b/backend/apigateway/build.gradle
@@ -15,6 +15,7 @@ repositories {
 
 ext {
     set('springCloudVersion', "2020.0.3")
+    set('log4j2.version', "2.15.0") // log4j 보안 패치
 }
 
 dependencies {
diff --git a/backend/board-service/build.gradle b/backend/board-service/build.gradle
index bec03be..fe28f1d 100644
--- a/backend/board-service/build.gradle
+++ b/backend/board-service/build.gradle
@@ -24,6 +24,7 @@ repositories {
 
 ext {
     set('springCloudVersion', "2020.0.3")
+    set('log4j2.version', "2.15.0") // log4j 보안 패치
 }
 
 dependencies {
diff --git a/backend/config/build.gradle b/backend/config/build.gradle
index c4a2df1..c065ff1 100644
--- a/backend/config/build.gradle
+++ b/backend/config/build.gradle
@@ -14,6 +14,7 @@ repositories {
 
 ext {
     set('springCloudVersion', "2020.0.3")
+    set('log4j2.version', "2.15.0") // log4j 보안 패치
 }
 
 dependencies {
diff --git a/backend/discovery/build.gradle b/backend/discovery/build.gradle
index a547611..5412ab0 100644
--- a/backend/discovery/build.gradle
+++ b/backend/discovery/build.gradle
@@ -14,6 +14,7 @@ repositories {
 
 ext {
     set('springCloudVersion', "2020.0.3")
+    set('log4j2.version', "2.15.0") // log4j 보안 패치
 }
 
 dependencies {
diff --git a/backend/module-common/build.gradle b/backend/module-common/build.gradle
index 68a7ac2..7e72123 100644
--- a/backend/module-common/build.gradle
+++ b/backend/module-common/build.gradle
@@ -30,6 +30,7 @@ configurations {
 
 ext {
     set('springCloudVersion', "2020.0.3")
+    set('log4j2.version', "2.15.0") // log4j 보안 패치
 }
 
 dependencies {
diff --git a/backend/portal-service/build.gradle b/backend/portal-service/build.gradle
index afee030..6602274 100644
--- a/backend/portal-service/build.gradle
+++ b/backend/portal-service/build.gradle
@@ -24,6 +24,7 @@ repositories {
 
 ext {
     set('springCloudVersion', "2020.0.3")
+    set('log4j2.version', "2.15.0") // log4j 보안 패치
 }
 
 dependencies {
diff --git a/backend/reserve-check-service/build.gradle b/backend/reserve-check-service/build.gradle
index 5bc9e10..508f273 100644
--- a/backend/reserve-check-service/build.gradle
+++ b/backend/reserve-check-service/build.gradle
@@ -21,6 +21,7 @@ repositories {
 
 ext {
     set('springCloudVersion', "2020.0.3")
+    set('log4j2.version', "2.15.0") // log4j 보안 패치
 }
 
 dependencies {
diff --git a/backend/reserve-item-service/build.gradle b/backend/reserve-item-service/build.gradle
index 3c077c0..6ca6e3d 100644
--- a/backend/reserve-item-service/build.gradle
+++ b/backend/reserve-item-service/build.gradle
@@ -21,6 +21,7 @@ repositories {
 
 ext {
     set('springCloudVersion', "2020.0.3")
+    set('log4j2.version', "2.15.0") // log4j 보안 패치
 }
 
 dependencies {
diff --git a/backend/reserve-request-service/build.gradle b/backend/reserve-request-service/build.gradle
index c740fce..f55c315 100644
--- a/backend/reserve-request-service/build.gradle
+++ b/backend/reserve-request-service/build.gradle
@@ -21,6 +21,7 @@ repositories {
 
 ext {
     set('springCloudVersion', "2020.0.3")
+    set('log4j2.version', "2.15.0") // log4j 보안 패치
 }
 
 
diff --git a/backend/user-service/build.gradle b/backend/user-service/build.gradle
index 5435f19..52ff5d6 100644
--- a/backend/user-service/build.gradle
+++ b/backend/user-service/build.gradle
@@ -24,6 +24,7 @@ repositories {
 
 ext {
     set('springCloudVersion', "2020.0.3")
+    set('log4j2.version', "2.15.0") // log4j 보안 패치
 }
 
 dependencies {