diff --git a/spring-cloud-function-context/pom.xml b/spring-cloud-function-context/pom.xml
index bc81fe6b6..21dbb0858 100644
--- a/spring-cloud-function-context/pom.xml
+++ b/spring-cloud-function-context/pom.xml
@@ -74,11 +74,13 @@
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-stdlib-jdk8</artifactId>
+			<version>1.6.0-RC2</version>
 			<optional>true</optional>
 		</dependency>
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-reflect</artifactId>
+			<version>1.6.0-RC2</version>
 			<optional>true</optional>
 		</dependency>
 		<dependency>
@@ -98,7 +100,7 @@
 			<plugin>
 				<artifactId>kotlin-maven-plugin</artifactId>
 				<groupId>org.jetbrains.kotlin</groupId>
-				<version>1.4.21</version>
+				<version>1.6.0-RC2</version>
 				<configuration>
 					<args>
 						<arg>-Xjsr305=strict</arg>
@@ -137,7 +139,7 @@
 					<dependency>
 						<groupId>org.jetbrains.kotlin</groupId>
 						<artifactId>kotlin-maven-allopen</artifactId>
-						<version>1.4.21</version>
+						<version>1.6.0-RC2</version>
 					</dependency>
 				</dependencies>
 			</plugin>
diff --git a/spring-cloud-function-kotlin/pom.xml b/spring-cloud-function-kotlin/pom.xml
index 54e0b7876..aa982b630 100644
--- a/spring-cloud-function-kotlin/pom.xml
+++ b/spring-cloud-function-kotlin/pom.xml
@@ -27,6 +27,7 @@
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-reflect</artifactId>
+			<version>1.6.0-RC2</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jetbrains.kotlinx</groupId>
@@ -64,7 +65,7 @@
 			<plugin>
 				<artifactId>kotlin-maven-plugin</artifactId>
 				<groupId>org.jetbrains.kotlin</groupId>
-				<version>1.4.21</version>
+				<version>1.6.0-RC2</version>
 				<configuration>
 					<args>
 						<arg>-Xjsr305=strict</arg>
@@ -93,7 +94,7 @@
 					<dependency>
 						<groupId>org.jetbrains.kotlin</groupId>
 						<artifactId>kotlin-maven-allopen</artifactId>
-						<version>1.4.21</version>
+						<version>1.6.0-RC2</version>
 					</dependency>
 				</dependencies>
 			</plugin>
diff --git a/spring-cloud-function-samples/function-sample-kotlin-web/pom.xml b/spring-cloud-function-samples/function-sample-kotlin-web/pom.xml
index 06e27ded2..53ec794d2 100644
--- a/spring-cloud-function-samples/function-sample-kotlin-web/pom.xml
+++ b/spring-cloud-function-samples/function-sample-kotlin-web/pom.xml
@@ -17,7 +17,7 @@
 
 	<properties>
 		<java.version>1.8</java.version>
-		<kotlin.version>1.4.21</kotlin.version>
+		<kotlin.version>1.6.0-RC2</kotlin.version>
 	</properties>
 
 	<dependencies>
@@ -28,10 +28,12 @@
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-reflect</artifactId>
+			<version>${kotlin.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-stdlib-jdk8</artifactId>
+			<version>${kotlin.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.cloud</groupId>