diff --git a/reactor-tests/pom.xml b/reactor-tests/pom.xml
index b2cad7f..8339cf7 100644
--- a/reactor-tests/pom.xml
+++ b/reactor-tests/pom.xml
@@ -23,7 +23,7 @@
     <junit-jupiter.version>5.5.0-M1</junit-jupiter.version>
     <assertj.version>3.12.2</assertj.version>
     <assertk.version>0.13</assertk.version>
-    <junit4.version>4.12</junit4.version>
+    <junit4.version>4.13.1</junit4.version>
 
     <java.version>1.8</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>