diff --git a/.github/workflows/gradle-pr-build.yml b/.github/workflows/gradle-pr-build.yml
index f904ff7a43..0a4d015ae7 100644
--- a/.github/workflows/gradle-pr-build.yml
+++ b/.github/workflows/gradle-pr-build.yml
@@ -12,15 +12,13 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Java 8
-        uses: actions/setup-java@v3
+      - uses: actions/setup-java@v3
         with:
           distribution: 'zulu'
           java-version: 8
+      - uses: gradle/gradle-build-action@v2
       - name: Build with release Kotlin version
-        uses: gradle/gradle-build-action@v2
-        with:
-          arguments: clean build ktlint
+        run: ./gradlew clean build ktlint
       - name: Upload dependency verification report
         uses: actions/upload-artifact@v3
         if: failure()
@@ -36,6 +34,4 @@ jobs:
           path: '**/tests/**/*.html'
           if-no-files-found: warn
       - name: Build with dev Kotlin version
-        uses: gradle/gradle-build-action@v2
-        with:
-          arguments: -PkotlinDev clean build ktlint
+        run: ./gradlew -PkotlinDev clean build ktlint
diff --git a/.github/workflows/gradle-snapshot-build.yml b/.github/workflows/gradle-snapshot-build.yml
index c3a16ec92e..48c52f7326 100644
--- a/.github/workflows/gradle-snapshot-build.yml
+++ b/.github/workflows/gradle-snapshot-build.yml
@@ -4,28 +4,22 @@ on:
   push:
     branches: [ master ]
 
+env:
+  SONATYPE_NEXUS_USERNAME: ${{ secrets.SONATYPE_NEXUS_USERNAME }}
+  SONATYPE_NEXUS_PASSWORD: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
+
 jobs:
   publish:
     runs-on: ubuntu-latest
     if: github.repository == 'pinterest/ktlint'
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Java 8
-        uses: actions/setup-java@v3
+      - uses: actions/setup-java@v3
         with:
           distribution: 'zulu'
           java-version: 8
+      - uses: gradle/gradle-build-action@v2
       - name: Publish snapshot to Maven
-        uses: gradle/gradle-build-action@v2
-        with:
-          arguments: clean publishMavenPublicationToMavenCentralRepository --no-daemon --no-parallel
-        env:
-          SONATYPE_NEXUS_USERNAME: ${{ secrets.SONATYPE_NEXUS_USERNAME }}
-          SONATYPE_NEXUS_PASSWORD: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
+        run: ./gradlew clean publishMavenPublicationToMavenCentralRepository --no-daemon --no-parallel
       - name: Publish Kotlin-dev snapshot to Maven
-        uses: gradle/gradle-build-action@v2
-        with:
-          arguments: -PkotlinDev clean publishMavenPublicationToMavenCentralRepository --no-daemon --no-parallel
-        env:
-          SONATYPE_NEXUS_USERNAME: ${{ secrets.SONATYPE_NEXUS_USERNAME }}
-          SONATYPE_NEXUS_PASSWORD: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
+        run: ./gradlew -PkotlinDev clean publishMavenPublicationToMavenCentralRepository --no-daemon --no-parallel
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9050755a06..6036491af9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,7 +9,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ### Fixed
 
 ### Changed
-* Set Kotlin development version to `1.6.20-RC2` and Kotlin version to `1.6.10`.
+* Set Kotlin development version to `1.6.20` and Kotlin version to `1.6.20`.
 
 ### Removed
 
diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index c025d78024..2f3faa551c 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -15,9 +15,9 @@ repositories {
 // Pass '-PkotlinDev' to command line to enable kotlin-in-development version
 val kotlinVersion = if (project.hasProperty("kotlinDev")) {
     logger.warn("Enabling kotlin dev version!")
-    "1.6.20-RC2"
+    "1.6.20"
 } else {
-    "1.6.10"
+    "1.6.20"
 }
 
 dependencies {
diff --git a/buildSrc/src/main/kotlin/ktlint-kotlin-common.gradle.kts b/buildSrc/src/main/kotlin/ktlint-kotlin-common.gradle.kts
index 5e32163ec1..29897dc690 100644
--- a/buildSrc/src/main/kotlin/ktlint-kotlin-common.gradle.kts
+++ b/buildSrc/src/main/kotlin/ktlint-kotlin-common.gradle.kts
@@ -25,7 +25,7 @@ tasks
         kotlinOptions {
             apiVersion = "1.4"
             @Suppress("SuspiciousCollectionReassignment")
-            freeCompilerArgs += listOf("-Xopt-in=kotlin.RequiresOptIn")
+            freeCompilerArgs += listOf("-opt-in=kotlin.RequiresOptIn")
         }
     }