diff --git a/demo-interview/pom.xml b/demo-interview/pom.xml
index 388b31b..0d9f00d 100644
--- a/demo-interview/pom.xml
+++ b/demo-interview/pom.xml
@@ -16,7 +16,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>3.8.1</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
   </dependencies>
diff --git a/demo-multi-thread/pom.xml b/demo-multi-thread/pom.xml
index df4d2d7..dc102ae 100644
--- a/demo-multi-thread/pom.xml
+++ b/demo-multi-thread/pom.xml
@@ -16,7 +16,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>3.8.1</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
   </dependencies>
diff --git a/pom.xml b/pom.xml
index cd33c12..ccbcdc4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -34,7 +34,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>