diff --git a/libraries/scripting/common/src/kotlin/script/experimental/api/kotlinType.kt b/libraries/scripting/common/src/kotlin/script/experimental/api/kotlinType.kt
index 4a7c8a1c2a5..bf20848496d 100644
--- a/libraries/scripting/common/src/kotlin/script/experimental/api/kotlinType.kt
+++ b/libraries/scripting/common/src/kotlin/script/experimental/api/kotlinType.kt
@@ -5,6 +5,7 @@
 
 package kotlin.script.experimental.api
 
+import java.io.Serializable
 import kotlin.reflect.KClass
 import kotlin.reflect.KType
 
@@ -13,9 +14,9 @@ import kotlin.reflect.KType
  */
 class KotlinType private constructor(
     val typeName: String,
-    val fromClass: KClass<*>?
+    @Transient val fromClass: KClass<*>? = null
     // TODO: copy properties from KType
-) {
+) : Serializable {
     /**
      * Constructs KotlinType from fully-qualified [qualifiedTypeName] in a dot-separated form, e.g. "org.acme.Outer.Inner"
      */
diff --git a/libraries/scripting/common/src/kotlin/script/experimental/api/scriptCompilation.kt b/libraries/scripting/common/src/kotlin/script/experimental/api/scriptCompilation.kt
index cb597239b0d..5e72e3fa7cf 100644
--- a/libraries/scripting/common/src/kotlin/script/experimental/api/scriptCompilation.kt
+++ b/libraries/scripting/common/src/kotlin/script/experimental/api/scriptCompilation.kt
@@ -7,6 +7,7 @@
 
 package kotlin.script.experimental.api
 
+import java.io.Serializable
 import kotlin.reflect.KClass
 import kotlin.script.experimental.util.PropertiesCollection
 
@@ -104,17 +105,17 @@ typealias RefineScriptCompilationConfigurationHandler =
 // to make it "hasheable" for cashing
 class RefineConfigurationBeforeParsingData(
     val handler: RefineScriptCompilationConfigurationHandler
-)
+) : Serializable
 
 class RefineConfigurationOnAnnotationsData(
     val annotations: List<KotlinType>,
     val handler: RefineScriptCompilationConfigurationHandler
-)
+) : Serializable
 
 class RefineConfigurationOnSectionsData(
     val sections: List<String>,
     val handler: RefineScriptCompilationConfigurationHandler
-)
+) : Serializable
 
 
 interface ScriptCompiler {
diff --git a/libraries/scripting/common/src/kotlin/script/experimental/api/scriptData.kt b/libraries/scripting/common/src/kotlin/script/experimental/api/scriptData.kt
index 8c7426501ef..6acfcad4b4f 100644
--- a/libraries/scripting/common/src/kotlin/script/experimental/api/scriptData.kt
+++ b/libraries/scripting/common/src/kotlin/script/experimental/api/scriptData.kt
@@ -7,6 +7,7 @@
 
 package kotlin.script.experimental.api
 
+import java.io.Serializable
 import java.net.URL
 import kotlin.script.experimental.util.PropertiesCollection
 
@@ -39,7 +40,7 @@ data class ResolvingRestrictionRule(
     }
 }
 
-interface ScriptDependency {
+interface ScriptDependency : Serializable {
     // Q: anything generic here?
 }
 
diff --git a/libraries/scripting/common/src/kotlin/script/experimental/util/propertiesCollection.kt b/libraries/scripting/common/src/kotlin/script/experimental/util/propertiesCollection.kt
index ac7ad12ca21..72c0f7943ed 100644
--- a/libraries/scripting/common/src/kotlin/script/experimental/util/propertiesCollection.kt
+++ b/libraries/scripting/common/src/kotlin/script/experimental/util/propertiesCollection.kt
@@ -5,14 +5,25 @@
 
 package kotlin.script.experimental.util
 
+import java.io.Serializable
 import kotlin.reflect.KClass
 import kotlin.reflect.KProperty
 import kotlin.reflect.KType
 import kotlin.script.experimental.api.KotlinType
 
-open class PropertiesCollection(private val properties: Map<Key<*>, Any> = emptyMap()) {
+open class PropertiesCollection(private val properties: Map<Key<*>, Any> = emptyMap()) : Serializable {
 
-    data class Key<T>(val name: String, val defaultValue: T? = null)
+    class Key<T>(val name: String, @Transient val defaultValue: T? = null) : Serializable {
+
+        override fun equals(other: Any?): Boolean = if (other is Key<*>) name == other.name else false
+        override fun hashCode(): Int = name.hashCode()
+        override fun toString(): String = "Key($name)"
+
+        companion object {
+            @JvmStatic
+            private val serialVersionUID = 0L
+        }
+    }
 
     class PropertyKeyDelegate<T>(private val defaultValue: T? = null) {
         operator fun getValue(thisRef: Any?, property: KProperty<*>): Key<T> =
@@ -36,6 +47,9 @@ open class PropertiesCollection(private val properties: Map<Key<*>, Any> = empty
     companion object {
         fun <T> key(defaultValue: T? = null) = PropertyKeyDelegate(defaultValue)
         fun <T> keyCopy(source: Key<T>) = PropertyKeyCopyDelegate(source)
+
+        @JvmStatic
+        private val serialVersionUID = 0L
     }
 
     // properties builder base class (DSL for building properties collection)