diff --git a/Jenkinsfile b/Jenkinsfile
index d498642..0f2b43b 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -40,7 +40,7 @@ node("docker && linux && amd64") {
 			}
 
 			def imageTag = "${dockerNamespace}/${dockerBase}:${guacamoleVersion}-tomcat${tomcatVersion}-jre${jreVersion}"
-			images <<< [ image, imageFullName ]
+			images << [ image, imageFullName ]
 		}
 	}