diff --git a/pom.xml b/pom.xml
index 5452d6ee..0e14abc8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,8 +14,8 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
-        <kotlin.version>1.3.72</kotlin.version>
-        <kotlin-coroutines.version>1.3.9</kotlin-coroutines.version>
+        <kotlin.version>1.4.21</kotlin.version>
+        <kotlin-coroutines.version>1.4.2</kotlin-coroutines.version>
         <jackson.version>2.10.3</jackson.version>
         <graphql-java.version>16.1</graphql-java.version>
 
diff --git a/src/test/kotlin/graphql/kickstart/tools/EndToEndSpecHelper.kt b/src/test/kotlin/graphql/kickstart/tools/EndToEndSpecHelper.kt
index 8b9801ec..e9480e40 100644
--- a/src/test/kotlin/graphql/kickstart/tools/EndToEndSpecHelper.kt
+++ b/src/test/kotlin/graphql/kickstart/tools/EndToEndSpecHelper.kt
@@ -232,7 +232,7 @@ val thirdItems = listOf(
 )
 
 val propetyHashMapItems = listOf(
-    hashMapOf("name" to "bob", "age" to 55)
+    hashMapOf<String, Any>("name" to "bob", "age" to 55)
 )
 
 val propertyMapMissingNamePropItems = listOf(