diff --git a/pom.xml b/pom.xml
index b558e69..81a17c4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -18,7 +18,7 @@
     <url>http://maven.apache.org</url>
 
     <properties>
-        <abstract-operator.version>0.6.0</abstract-operator.version>
+        <abstract-operator.version>0.6.9</abstract-operator.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <kotlin.version>1.2.60</kotlin.version>
         <junit.version>4.11</junit.version>