diff --git a/number-spectra/pom.xml b/number-spectra/pom.xml
index 4d8bb5c..8722d73 100644
--- a/number-spectra/pom.xml
+++ b/number-spectra/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>
   </dependencies>