diff --git a/pom.xml b/pom.xml
index 2b4adce..07900d4 100755
--- a/pom.xml
+++ b/pom.xml
@@ -34,7 +34,7 @@
     <dependency>
       <groupId>org.assertj</groupId>
       <artifactId>assertj-core</artifactId>
-      <version>3.11.1</version>
+      <version>3.5.1</version>
       <scope>test</scope>
     </dependency>