diff --git a/pom.xml b/pom.xml
index 5c200cc..3fc1cc5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -32,12 +32,12 @@
         <dependency>
             <groupId>org.jetbrains.kotlin</groupId>
             <artifactId>kotlin-stdlib-jdk8</artifactId>
-            <version>${kotlin.version}</version>
+            <version>1.6.20</version>
         </dependency>
         <dependency>
             <groupId>org.jetbrains.kotlin</groupId>
             <artifactId>kotlin-test</artifactId>
-            <version>${kotlin.version}</version>
+            <version>1.6.20</version>
             <scope>test</scope>
         </dependency>
     </dependencies>