diff --git a/gradle.properties b/gradle.properties
index dbb2da7fa85..3c804e7e43a 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -4,7 +4,7 @@ org.gradle.parallel=true
 org.gradle.caching=true
 
 cacheRedirectorEnabled=true
-defaultSnapshotVersion=1.4.255-SNAPSHOT
+defaultSnapshotVersion=1.5.255-SNAPSHOT
 
 kotlin.compiler.effectSystemEnabled=true
 kotlin.compiler.newInferenceEnabled=true
diff --git a/idea/idea-gradle/tests/org/jetbrains/kotlin/idea/codeInsight/gradle/MultiplePluginVersionGradleImportingTestCase.kt b/idea/idea-gradle/tests/org/jetbrains/kotlin/idea/codeInsight/gradle/MultiplePluginVersionGradleImportingTestCase.kt
index ebabb3c78a2..614d1bcd6fa 100644
--- a/idea/idea-gradle/tests/org/jetbrains/kotlin/idea/codeInsight/gradle/MultiplePluginVersionGradleImportingTestCase.kt
+++ b/idea/idea-gradle/tests/org/jetbrains/kotlin/idea/codeInsight/gradle/MultiplePluginVersionGradleImportingTestCase.kt
@@ -64,7 +64,7 @@ abstract class MultiplePluginVersionGradleImportingTestCase : GradleImportingTes
                 ?.firstOrNull { it.contains("-original.jar") }?.replace(
                     "kotlin-gradle-plugin-",
                     ""
-                )?.replace("-original.jar", "") ?: "1.4.255-SNAPSHOT"
+                )?.replace("-original.jar", "") ?: "1.5.255-SNAPSHOT"
 
         @JvmStatic
         @Parameterized.Parameters(name = "{index}: Gradle-{0}, KotlinGradlePlugin-{1}")
diff --git a/idea/idea-jvm/src/org/jetbrains/kotlin/idea/configuration/ConfigureKotlinInProjectUtils.kt b/idea/idea-jvm/src/org/jetbrains/kotlin/idea/configuration/ConfigureKotlinInProjectUtils.kt
index e3e14621492..06de3012bea 100644
--- a/idea/idea-jvm/src/org/jetbrains/kotlin/idea/configuration/ConfigureKotlinInProjectUtils.kt
+++ b/idea/idea-jvm/src/org/jetbrains/kotlin/idea/configuration/ConfigureKotlinInProjectUtils.kt
@@ -49,7 +49,7 @@ private val LOG = Logger.getInstance("#org.jetbrains.kotlin.idea.configuration.C
 
 data class RepositoryDescription(val id: String, val name: String, val url: String, val bintrayUrl: String?, val isSnapshot: Boolean)
 
-const val LAST_SNAPSHOT_VERSION = "1.4.255-SNAPSHOT"
+const val LAST_SNAPSHOT_VERSION = "1.5.255-SNAPSHOT"
 
 val SNAPSHOT_REPOSITORY = RepositoryDescription(
     "sonatype.oss.snapshots",
diff --git a/libraries/examples/browser-example-with-library/pom.xml b/libraries/examples/browser-example-with-library/pom.xml
index d9658e48db4..9102ff63085 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/examples/browser-example/pom.xml b/libraries/examples/browser-example/pom.xml
index 455b71074a5..ccb06af7f30 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/examples/js-example/pom.xml b/libraries/examples/js-example/pom.xml
index 961111f5b12..13476016d18 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-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 10a0e5b8f31..faa2ede8e26 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-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 cfef7a7122e..cc3cde713c7 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/pom.xml b/libraries/pom.xml
index 542995e8cba..16602a6edf0 100644
--- a/libraries/pom.xml
+++ b/libraries/pom.xml
@@ -7,7 +7,7 @@
 
     <groupId>org.jetbrains.kotlin</groupId>
     <artifactId>kotlin-project</artifactId>
-    <version>1.4.255-SNAPSHOT</version>
+    <version>1.5.255-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 1868beb593e..4c2d2a1b8ac 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>1.4.255-SNAPSHOT</version>
+    <version>1.5.255-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/libraries/tools/kotlin-bom/pom.xml b/libraries/tools/kotlin-bom/pom.xml
index 8b8900bd18f..7e1863f7e61 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>1.4.255-SNAPSHOT</version>
+    <version>1.5.255-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 17ae4b78e6d..53b98c078b1 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-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 0a90a533b46..b32c3ccfcd4 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-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 48fcc8b6fec..c584c0f5117 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-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 299ecf4d3a7..85e1d0be2a0 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-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 7210d0807e2..ac785b99ead 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-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 8acfef86320..4a8cbd297e9 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-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 57c9c2029f0..0bb52cae82a 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/libraries/tools/maven-archetypes/kotlin-archetype-js/pom.xml b/libraries/tools/maven-archetypes/kotlin-archetype-js/pom.xml
index 9232dd61fec..38c2b3eb277 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-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 2adc81d4d19..a4720a26c0a 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/libraries/tools/maven-archetypes/pom.xml b/libraries/tools/maven-archetypes/pom.xml
index 97d0d361f3f..e701f3686e6 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>1.4.255-SNAPSHOT</version>
+        <version>1.5.255-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/plugins/fir/fir-plugin-prototype/tests/org/jetbrains/kotlin/fir/plugin/AbstractFirAllOpenDiagnosticTest.kt b/plugins/fir/fir-plugin-prototype/tests/org/jetbrains/kotlin/fir/plugin/AbstractFirAllOpenDiagnosticTest.kt
index ee7451086d3..b2a1793f90a 100644
--- a/plugins/fir/fir-plugin-prototype/tests/org/jetbrains/kotlin/fir/plugin/AbstractFirAllOpenDiagnosticTest.kt
+++ b/plugins/fir/fir-plugin-prototype/tests/org/jetbrains/kotlin/fir/plugin/AbstractFirAllOpenDiagnosticTest.kt
@@ -21,7 +21,7 @@ abstract class AbstractFirAllOpenDiagnosticTest : AbstractFirDiagnosticsTest() {
 
     override fun updateConfiguration(configuration: CompilerConfiguration) {
         super.updateConfiguration(configuration)
-        val jar = File("plugins/fir/fir-plugin-prototype/plugin-annotations/build/libs/plugin-annotations-1.4.255-SNAPSHOT.jar")
+        val jar = File("plugins/fir/fir-plugin-prototype/plugin-annotations/build/libs/plugin-annotations-1.5.255-SNAPSHOT.jar")
         if (!jar.exists()) {
             throw AssertionError("Jar with annotations does not exist. Please run :plugins:fir:fir-plugin-prototype:plugin-annotations:jar")
         }