diff --git a/common/pom.xml b/common/pom.xml
index 266a7b4..ca1fe20 100644
--- a/common/pom.xml
+++ b/common/pom.xml
@@ -25,7 +25,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
         </dependency>
     </dependencies>
 </project>
diff --git a/first-client/pom.xml b/first-client/pom.xml
index c22d6e7..f520ea9 100644
--- a/first-client/pom.xml
+++ b/first-client/pom.xml
@@ -25,7 +25,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
         </dependency>
     </dependencies>
 
diff --git a/pom.xml b/pom.xml
index 177a083..2e30159 100644
--- a/pom.xml
+++ b/pom.xml
@@ -38,7 +38,7 @@
             <dependency>
                 <groupId>junit</groupId>
                 <artifactId>junit</artifactId>
-                <version>4.12</version>
+                <version>4.13.1</version>
                 <scope>test</scope>
             </dependency>
         </dependencies>