diff --git a/plugin/pom.xml b/plugin/pom.xml
index f117967d5..77c5f488d 100644
--- a/plugin/pom.xml
+++ b/plugin/pom.xml
@@ -245,7 +245,7 @@
     <dependency>
       <groupId>org.jenkins-ci.plugins</groupId>
       <artifactId>timestamper</artifactId>
-      <version>1.18</version>
+      <version>1.20</version>
       <scope>test</scope>
     </dependency>