diff --git a/Chapter01/maven-mix/pom.xml b/Chapter01/maven-mix/pom.xml
index 4675d17..57bc608 100644
--- a/Chapter01/maven-mix/pom.xml
+++ b/Chapter01/maven-mix/pom.xml
@@ -35,7 +35,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <kotlin.version>1.1-M04</kotlin.version>
+        <kotlin.version>1.6.0-M1</kotlin.version>
         <junit.version>4.12</junit.version>
     </properties>