diff --git a/libraries/examples/browser-example-with-library/pom.xml b/libraries/examples/browser-example-with-library/pom.xml
index 9102ff63085..a166c892a1a 100644
--- a/libraries/examples/browser-example-with-library/pom.xml
+++ b/libraries/examples/browser-example-with-library/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/examples/browser-example/pom.xml b/libraries/examples/browser-example/pom.xml
index ccb06af7f30..96a1fcf4a69 100644
--- a/libraries/examples/browser-example/pom.xml
+++ b/libraries/examples/browser-example/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/examples/js-example/pom.xml b/libraries/examples/js-example/pom.xml
index 13476016d18..27435bba74b 100644
--- a/libraries/examples/js-example/pom.xml
+++ b/libraries/examples/js-example/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/examples/kotlin-java-example/pom.xml b/libraries/examples/kotlin-java-example/pom.xml
index faa2ede8e26..86d653f6a1e 100644
--- a/libraries/examples/kotlin-java-example/pom.xml
+++ b/libraries/examples/kotlin-java-example/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/examples/kotlin-js-library-example/pom.xml b/libraries/examples/kotlin-js-library-example/pom.xml
index cc3cde713c7..dd8ab6acede 100644
--- a/libraries/examples/kotlin-js-library-example/pom.xml
+++ b/libraries/examples/kotlin-js-library-example/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/pom.xml b/libraries/pom.xml
index 8625f8f5ad5..468ca9403dd 100644
--- a/libraries/pom.xml
+++ b/libraries/pom.xml
@@ -7,7 +7,7 @@
 
     <groupId>org.jetbrains.kotlin</groupId>
     <artifactId>kotlin-project</artifactId>
-    <version>1.5.255-SNAPSHOT</version>
+    <version>1.6.255-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>Kotlin</name>
diff --git a/libraries/tools/kotlin-annotation-processing-maven/pom.xml b/libraries/tools/kotlin-annotation-processing-maven/pom.xml
index 4c2d2a1b8ac..a3d52ec56ab 100755
--- a/libraries/tools/kotlin-annotation-processing-maven/pom.xml
+++ b/libraries/tools/kotlin-annotation-processing-maven/pom.xml
@@ -16,7 +16,7 @@
   <parent>
     <groupId>org.jetbrains.kotlin</groupId>
     <artifactId>kotlin-project</artifactId>
-    <version>1.5.255-SNAPSHOT</version>
+    <version>1.6.255-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/libraries/tools/kotlin-bom/pom.xml b/libraries/tools/kotlin-bom/pom.xml
index 7e1863f7e61..06994776951 100644
--- a/libraries/tools/kotlin-bom/pom.xml
+++ b/libraries/tools/kotlin-bom/pom.xml
@@ -7,7 +7,7 @@
 
     <groupId>org.jetbrains.kotlin</groupId>
     <artifactId>kotlin-bom</artifactId>
-    <version>1.5.255-SNAPSHOT</version>
+    <version>1.6.255-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <!-- No parent to avoid accidentally inheriting parent's dependencyManagement section -->
diff --git a/libraries/tools/kotlin-maven-allopen/pom.xml b/libraries/tools/kotlin-maven-allopen/pom.xml
index 53b98c078b1..e49635dbf5e 100755
--- a/libraries/tools/kotlin-maven-allopen/pom.xml
+++ b/libraries/tools/kotlin-maven-allopen/pom.xml
@@ -14,7 +14,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/tools/kotlin-maven-lombok/pom.xml b/libraries/tools/kotlin-maven-lombok/pom.xml
index c1c4303e7f6..4536999e270 100755
--- a/libraries/tools/kotlin-maven-lombok/pom.xml
+++ b/libraries/tools/kotlin-maven-lombok/pom.xml
@@ -14,7 +14,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/tools/kotlin-maven-noarg/pom.xml b/libraries/tools/kotlin-maven-noarg/pom.xml
index b32c3ccfcd4..69215ffb056 100755
--- a/libraries/tools/kotlin-maven-noarg/pom.xml
+++ b/libraries/tools/kotlin-maven-noarg/pom.xml
@@ -14,7 +14,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/tools/kotlin-maven-plugin-test/pom.xml b/libraries/tools/kotlin-maven-plugin-test/pom.xml
index 8c7c4e2e0d8..db2be72841a 100644
--- a/libraries/tools/kotlin-maven-plugin-test/pom.xml
+++ b/libraries/tools/kotlin-maven-plugin-test/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>kotlin-project</artifactId>
         <groupId>org.jetbrains.kotlin</groupId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/libraries/tools/kotlin-maven-plugin/pom.xml b/libraries/tools/kotlin-maven-plugin/pom.xml
index 85e1d0be2a0..6505f75bbfc 100644
--- a/libraries/tools/kotlin-maven-plugin/pom.xml
+++ b/libraries/tools/kotlin-maven-plugin/pom.xml
@@ -12,7 +12,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/tools/kotlin-maven-sam-with-receiver/pom.xml b/libraries/tools/kotlin-maven-sam-with-receiver/pom.xml
index ac785b99ead..502dc0c927f 100755
--- a/libraries/tools/kotlin-maven-sam-with-receiver/pom.xml
+++ b/libraries/tools/kotlin-maven-sam-with-receiver/pom.xml
@@ -14,7 +14,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/tools/kotlin-maven-serialization/pom.xml b/libraries/tools/kotlin-maven-serialization/pom.xml
index 4a8cbd297e9..94f23af3da6 100755
--- a/libraries/tools/kotlin-maven-serialization/pom.xml
+++ b/libraries/tools/kotlin-maven-serialization/pom.xml
@@ -14,7 +14,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/tools/kotlin-osgi-bundle/pom.xml b/libraries/tools/kotlin-osgi-bundle/pom.xml
index 0bb52cae82a..226d51df49e 100644
--- a/libraries/tools/kotlin-osgi-bundle/pom.xml
+++ b/libraries/tools/kotlin-osgi-bundle/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>kotlin-project</artifactId>
         <groupId>org.jetbrains.kotlin</groupId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/libraries/tools/kotlin-stdlib-docs/kotlin_big/build.gradle b/libraries/tools/kotlin-stdlib-docs/kotlin_big/build.gradle
index cf304791554..7b73a47865c 100644
--- a/libraries/tools/kotlin-stdlib-docs/kotlin_big/build.gradle
+++ b/libraries/tools/kotlin-stdlib-docs/kotlin_big/build.gradle
@@ -7,7 +7,7 @@ final String kotlinRootDir = rootProject.file("../../../").absolutePath
 final String kotlinLibsDir = "$buildDir/libs"
 
 final String githubRevision = isTeamcityBuild ? project.property("githubRevision") : "master"
-final String kotlinVersion = isTeamcityBuild ? project.property("deployVersion") : "1.5.255-SNAPSHOT"
+final String kotlinVersion = isTeamcityBuild ? project.property("deployVersion") : "1.6.255-SNAPSHOT"
 final String repo = isTeamcityBuild ? project.property("kotlinLibsRepo") : "$kotlinRootDir/build/repo"
 
 println("# Extracting info:")
diff --git a/libraries/tools/kotlin-tooling-metadata/src/test/kotlin/org/jetbrains/kotlin/tooling/DeserializeStringTest.kt b/libraries/tools/kotlin-tooling-metadata/src/test/kotlin/org/jetbrains/kotlin/tooling/DeserializeStringTest.kt
index e1d877e7fb4..dbd26bcced2 100644
--- a/libraries/tools/kotlin-tooling-metadata/src/test/kotlin/org/jetbrains/kotlin/tooling/DeserializeStringTest.kt
+++ b/libraries/tools/kotlin-tooling-metadata/src/test/kotlin/org/jetbrains/kotlin/tooling/DeserializeStringTest.kt
@@ -28,7 +28,7 @@ class DeserializeStringTest {
             "buildSystem": "Gradle",
             "buildSystemVersion": "6.7",
             "buildPlugin": "org.jetbrains.kotlin.gradle.plugin.KotlinMultiplatformPluginWrapper",
-            "buildPluginVersion": "1.5.255-SNAPSHOT",
+            "buildPluginVersion": "1.6.255-SNAPSHOT",
             "projectSettings": {
               "isHmppEnabled": false,
               "isCompatibilityMetadataVariantEnabled": true
@@ -88,7 +88,7 @@ class DeserializeStringTest {
         assertEquals("Gradle", metadata.buildSystem)
         assertEquals("6.7", metadata.buildSystemVersion)
         assertEquals("org.jetbrains.kotlin.gradle.plugin.KotlinMultiplatformPluginWrapper", metadata.buildPlugin)
-        assertEquals("1.5.255-SNAPSHOT", metadata.buildPluginVersion)
+        assertEquals("1.6.255-SNAPSHOT", metadata.buildPluginVersion)
         assertFalse(metadata.projectSettings.isHmppEnabled)
         assertTrue(metadata.projectSettings.isCompatibilityMetadataVariantEnabled)
         assertEquals(5, metadata.projectTargets.size, "Expected exactly 4 targets")
diff --git a/libraries/tools/maven-archetypes/kotlin-archetype-js/pom.xml b/libraries/tools/maven-archetypes/kotlin-archetype-js/pom.xml
index 38c2b3eb277..a1bcf1d9ce8 100644
--- a/libraries/tools/maven-archetypes/kotlin-archetype-js/pom.xml
+++ b/libraries/tools/maven-archetypes/kotlin-archetype-js/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-archetypes-parent</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/tools/maven-archetypes/kotlin-archetype-jvm/pom.xml b/libraries/tools/maven-archetypes/kotlin-archetype-jvm/pom.xml
index a4720a26c0a..222add9225a 100644
--- a/libraries/tools/maven-archetypes/kotlin-archetype-jvm/pom.xml
+++ b/libraries/tools/maven-archetypes/kotlin-archetype-jvm/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-archetypes-parent</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/tools/maven-archetypes/pom.xml b/libraries/tools/maven-archetypes/pom.xml
index e701f3686e6..360ea3fcf6b 100644
--- a/libraries/tools/maven-archetypes/pom.xml
+++ b/libraries/tools/maven-archetypes/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.jetbrains.kotlin</groupId>
         <artifactId>kotlin-project</artifactId>
-        <version>1.5.255-SNAPSHOT</version>
+        <version>1.6.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>