diff --git a/birthday/pom.xml b/birthday/pom.xml
index 102c41b..759ccc0 100644
--- a/birthday/pom.xml
+++ b/birthday/pom.xml
@@ -15,7 +15,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
             <scope>test</scope>
             
         </dependency>
diff --git a/classic/pom.xml b/classic/pom.xml
index 32553d2..5965739 100644
--- a/classic/pom.xml
+++ b/classic/pom.xml
@@ -27,7 +27,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/hands/pom.xml b/hands/pom.xml
index e62ce40..d38c5fe 100644
--- a/hands/pom.xml
+++ b/hands/pom.xml
@@ -14,7 +14,7 @@
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
-			<version>4.12</version>
+			<version>4.13.1</version>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>
diff --git a/pom.xml b/pom.xml
index aa196e5..d882391 100644
--- a/pom.xml
+++ b/pom.xml
@@ -41,7 +41,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
     </dependencies>