diff --git a/pom.xml b/pom.xml
index 13eb0fb..1603bb8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,7 +30,7 @@
       <groupId>org.assertj</groupId>
       <artifactId>assertj-core</artifactId>
       <!-- sadly [3.4.0, 4.0.0) does not work -->
-      <version>[3.5.0, 3.99.0]</version>
+      <version>[3.6.1, 3.99.0]</version>
     </dependency>
     <dependency>
       <groupId>joda-time</groupId>