diff --git a/pom.xml b/pom.xml
index f832f78..60ca71f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,7 +20,7 @@
     <properties>
         <abstract-operator.version>0.2.2</abstract-operator.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <kotlin.version>1.2.60</kotlin.version>
+        <kotlin.version>1.3.21</kotlin.version>
         <junit.version>4.11</junit.version>
     </properties>