diff --git a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinFragment.kt b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinFragment.kt
index fec6066b9dc..917ceb93d45 100644
--- a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinFragment.kt
+++ b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinFragment.kt
@@ -24,4 +24,10 @@ data class IdeaKotlinFragmentImpl(
     override val directRefinesDependencies: Collection<IdeaKotlinFragment>,
     override val sourceDirectories: Collection<IdeaKotlinSourceDirectory>,
     override val resourceDirectories: Collection<IdeaKotlinResourceDirectory>
-) : IdeaKotlinFragment
+) : IdeaKotlinFragment {
+
+    @InternalKotlinGradlePluginApi
+    companion object {
+        private const val serialVersionUID = 0L
+    }
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinLanguageSettings.kt b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinLanguageSettings.kt
index 6445040670e..32d3744af16 100644
--- a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinLanguageSettings.kt
+++ b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinLanguageSettings.kt
@@ -29,4 +29,10 @@ data class IdeaKotlinLanguageSettingsImpl(
     override val compilerPluginArguments: Collection<String>,
     override val compilerPluginClasspath: Collection<File>,
     override val freeCompilerArgs: Collection<String>
-) : IdeaKotlinLanguageSettings
+) : IdeaKotlinLanguageSettings {
+
+    @InternalKotlinGradlePluginApi
+    companion object {
+        private const val serialVersionUID = 0L
+    }
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinModule.kt b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinModule.kt
index 87fd3033e87..e7556ebaf08 100644
--- a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinModule.kt
+++ b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinModule.kt
@@ -16,4 +16,10 @@ interface IdeaKotlinModule : Serializable {
 data class IdeaKotlinModuleImpl(
     override val moduleIdentifier: IdeaKotlinModuleIdentifier,
     override val fragments: Collection<IdeaKotlinFragment>
-) : IdeaKotlinModule
+) : IdeaKotlinModule {
+
+    @InternalKotlinGradlePluginApi
+    companion object {
+        private const val serialVersionUID = 0L
+    }
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinModuleIdentifier.kt b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinModuleIdentifier.kt
index b9724ac998c..30e01bec2a5 100644
--- a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinModuleIdentifier.kt
+++ b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinModuleIdentifier.kt
@@ -7,7 +7,7 @@ package org.jetbrains.kotlin.gradle.kpm.idea
 
 import java.io.Serializable
 
-sealed interface IdeaKotlinModuleIdentifier : Serializable {
+interface IdeaKotlinModuleIdentifier : Serializable {
     val moduleClassifier: String?
 }
 
@@ -26,11 +26,23 @@ data class IdeaKotlinLocalModuleIdentifierImpl(
     override val moduleClassifier: String?,
     override val buildId: String,
     override val projectId: String
-) : IdeaKotlinLocalModuleIdentifier
+) : IdeaKotlinLocalModuleIdentifier {
+
+    @InternalKotlinGradlePluginApi
+    companion object {
+        private const val serialVersionUID = 0L
+    }
+}
 
 @InternalKotlinGradlePluginApi
 data class IdeaKotlinMavenModuleIdentifierImpl(
     override val moduleClassifier: String?,
     override val group: String,
     override val name: String
-) : IdeaKotlinMavenModuleIdentifier
+) : IdeaKotlinMavenModuleIdentifier {
+
+    @InternalKotlinGradlePluginApi
+    companion object {
+        private const val serialVersionUID = 0L
+    }
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinProjectModel.kt b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinProjectModel.kt
index a69bec2ea49..a77e9fce8b5 100644
--- a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinProjectModel.kt
+++ b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinProjectModel.kt
@@ -21,4 +21,10 @@ data class IdeaKotlinProjectModelImpl(
     override val explicitApiModeCliOption: String?,
     override val kotlinNativeHome: File,
     override val modules: List<IdeaKotlinModule>
-) : IdeaKotlinProjectModel
+) : IdeaKotlinProjectModel {
+
+    @InternalKotlinGradlePluginApi
+    companion object {
+        private const val serialVersionUID = 0L
+    }
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinResourceDirectory.kt b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinResourceDirectory.kt
index c5ed9b1cbb0..f4179793f94 100644
--- a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinResourceDirectory.kt
+++ b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinResourceDirectory.kt
@@ -15,4 +15,10 @@ interface IdeaKotlinResourceDirectory : Serializable {
 @InternalKotlinGradlePluginApi
 data class IdeaKotlinResourceDirectoryImpl(
     override val file: File
-) : IdeaKotlinResourceDirectory
+) : IdeaKotlinResourceDirectory {
+
+    @InternalKotlinGradlePluginApi
+    companion object {
+        private const val serialVersionUID = 0L
+    }
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinSourceDirectory.kt b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinSourceDirectory.kt
index 3cf1d674e27..d174488fa6b 100644
--- a/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinSourceDirectory.kt
+++ b/libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinSourceDirectory.kt
@@ -15,4 +15,10 @@ interface IdeaKotlinSourceDirectory : Serializable {
 @InternalKotlinGradlePluginApi
 data class IdeaKotlinSourceDirectoryImpl(
     override val file: File,
-) : IdeaKotlinSourceDirectory
+) : IdeaKotlinSourceDirectory {
+
+    @InternalKotlinGradlePluginApi
+    companion object {
+        private const val serialVersionUID = 0L
+    }
+}