diff --git a/hmm-lib/pom.xml b/hmm-lib/pom.xml
index 1839908..2079e80 100644
--- a/hmm-lib/pom.xml
+++ b/hmm-lib/pom.xml
@@ -64,7 +64,7 @@
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
             <scope>test</scope>
-            <version>4.12</version>
+            <version>4.13.1</version>
         </dependency>
     </dependencies>