diff --git a/build.gradle b/build.gradle
index 51e5da7..619ccbe 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 buildscript {
 	ext {
-		kotlinVersion = '1.2.41'
+		kotlinVersion = '1.4.21'
 		springBootVersion = '2.0.3.RELEASE'
 	}
 	repositories {
@@ -24,7 +24,7 @@ version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
 compileKotlin {
 	kotlinOptions {
-		freeCompilerArgs = ["-Xjsr305=strict"]
+		freeCompilerArgs = ["-Xjsr305=strict", "-Xemit-jvm-type-annotations"]
 		jvmTarget = "1.8"
 	}
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 44d9d03..2813623 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip