diff --git a/add/pom.xml b/add/pom.xml
index 335b419..37bbbf2 100644
--- a/add/pom.xml
+++ b/add/pom.xml
@@ -31,7 +31,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.11</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
   </dependencies>
diff --git a/pom.xml b/pom.xml
index 47a14ff..ea018aa 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.11</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
   </dependencies>
diff --git a/sub/pom.xml b/sub/pom.xml
index a4755d0..1ceee0d 100644
--- a/sub/pom.xml
+++ b/sub/pom.xml
@@ -34,7 +34,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.11</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
   </dependencies>