diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4c47d4e..627957a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@
 
 * `Kotlin`: `1.3.71` -> `1.3.72`
 * Add `SerializersModuleBuilder#optionalContextual` for more comfortable usage of `contextual`
+* All `loadModule` functions now able to retrieve additional classes to inspect inside of serializer of module
 
 ## 0.2.0
 
diff --git a/src/commonMain/kotlin/com/insanusmokrassar/sdi/HelperTools.kt b/src/commonMain/kotlin/com/insanusmokrassar/sdi/HelperTools.kt
index dd4c591..19aae93 100644
--- a/src/commonMain/kotlin/com/insanusmokrassar/sdi/HelperTools.kt
+++ b/src/commonMain/kotlin/com/insanusmokrassar/sdi/HelperTools.kt
@@ -3,6 +3,7 @@ package com.insanusmokrassar.sdi
 import kotlinx.serialization.ImplicitReflectionSerializer
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.modules.SerializersModuleBuilder
+import kotlin.reflect.KClass
 
 internal val nonStrictJson = Json {
     isLenient = true
@@ -10,17 +11,23 @@ internal val nonStrictJson = Json {
     serializeSpecialFloatingPointValues = true
 }
 
-@ImplicitReflectionSerializer
-private val ModuleDeserializerStrategyWithNullOptional = ModuleDeserializerStrategy()
-
 @ImplicitReflectionSerializer
 fun Json.loadModule(
     json: String,
+    vararg additionalClassesToInclude: KClass<*>,
     moduleBuilder: (SerializersModuleBuilder.() -> Unit)? = null
-): Module = parse(if (moduleBuilder != null) ModuleDeserializerStrategy(moduleBuilder) else ModuleDeserializerStrategyWithNullOptional, json)
+): Module = parse(
+    if (moduleBuilder != null) {
+        ModuleDeserializerStrategy(moduleBuilder, *additionalClassesToInclude)
+    } else {
+        ModuleDeserializerStrategy(additionalClassesToInclude = *additionalClassesToInclude)
+    },
+    json
+)
 
 @ImplicitReflectionSerializer
 fun loadModule(
     json: String,
+    vararg additionalClassesToInclude: KClass<*>,
     moduleBuilder: (SerializersModuleBuilder.() -> Unit)? = null
-): Module = nonStrictJson.loadModule(json, moduleBuilder)
+): Module = nonStrictJson.loadModule(json, *additionalClassesToInclude, moduleBuilder = moduleBuilder)
diff --git a/src/commonMain/kotlin/com/insanusmokrassar/sdi/ModuleDeserializerStrategy.kt b/src/commonMain/kotlin/com/insanusmokrassar/sdi/ModuleDeserializerStrategy.kt
index 33b0aea..da0db8e 100644
--- a/src/commonMain/kotlin/com/insanusmokrassar/sdi/ModuleDeserializerStrategy.kt
+++ b/src/commonMain/kotlin/com/insanusmokrassar/sdi/ModuleDeserializerStrategy.kt
@@ -6,10 +6,12 @@ import kotlinx.serialization.builtins.MapSerializer
 import kotlinx.serialization.builtins.serializer
 import kotlinx.serialization.json.*
 import kotlinx.serialization.modules.SerializersModuleBuilder
+import kotlin.reflect.KClass
 
 @ImplicitReflectionSerializer
 internal class ModuleDeserializerStrategy(
-    private val moduleBuilder: (SerializersModuleBuilder.() -> Unit)? = null
+    private val moduleBuilder: (SerializersModuleBuilder.() -> Unit)? = null,
+    private vararg val additionalClassesToInclude: KClass<*>
 ) : DeserializationStrategy<Module> {
     private val internalSerializer = MapSerializer(String.serializer(), ContextSerializer(Any::class))
     override val descriptor: SerialDescriptor
@@ -17,7 +19,12 @@ internal class ModuleDeserializerStrategy(
 
     override fun deserialize(decoder: Decoder): Module {
         val json = JsonObjectSerializer.deserialize(decoder)
-        val jsonSerialFormat = createModuleBasedOnConfigRoot(json, moduleBuilder, decoder.context)
+        val jsonSerialFormat = createModuleBasedOnConfigRoot(
+            json,
+            moduleBuilder,
+            decoder.context,
+            *additionalClassesToInclude
+        )
         val resultJson = JsonObject(
             json.keys.associateWith { JsonPrimitive(it) }
         )
diff --git a/src/commonMain/kotlin/com/insanusmokrassar/sdi/utils/JsonAdaptations.kt b/src/commonMain/kotlin/com/insanusmokrassar/sdi/utils/JsonAdaptations.kt
index 30653bf..2771ce5 100644
--- a/src/commonMain/kotlin/com/insanusmokrassar/sdi/utils/JsonAdaptations.kt
+++ b/src/commonMain/kotlin/com/insanusmokrassar/sdi/utils/JsonAdaptations.kt
@@ -4,6 +4,7 @@ import kotlinx.serialization.ImplicitReflectionSerializer
 import kotlinx.serialization.InternalSerializationApi
 import kotlinx.serialization.json.*
 import kotlinx.serialization.modules.*
+import kotlin.reflect.KClass
 
 private typealias PackageOrOtherDependencyNamePair = Pair<String?, String?>
 
@@ -25,7 +26,8 @@ private fun JsonElement.resolvePackageName(currentKey: String, otherDependencies
 internal fun createModuleBasedOnConfigRoot(
     jsonObject: JsonObject,
     moduleBuilder: (SerializersModuleBuilder.() -> Unit)? = null,
-    baseContext: SerialModule
+    baseContext: SerialModule,
+    vararg additionalClassesToInclude: KClass<*>
 ): Json {
     lateinit var caches: Map<String, () -> Any>
     lateinit var jsonStringFormat: Json
@@ -85,6 +87,19 @@ internal fun createModuleBasedOnConfigRoot(
                     // here we are thinking that already registered
                 }
             }
+            additionalClassesToInclude.forEach {
+                try {
+                    DependencyResolver(
+                        this,
+                        it,
+                        { jsonStringFormat }
+                    ) {
+                        caches.getValue(it).invoke()
+                    }
+                } catch (e: AlreadyRegisteredException) {
+                    // here we are thinking that already registered
+                }
+            }
             if (moduleBuilder != null) {
                 moduleBuilder()
             }
diff --git a/src/jvmMain/kotlin/com/insanusmokrassar/sdi/JVMHelperTools.kt b/src/jvmMain/kotlin/com/insanusmokrassar/sdi/JVMHelperTools.kt
index 57d7c48..538aed2 100644
--- a/src/jvmMain/kotlin/com/insanusmokrassar/sdi/JVMHelperTools.kt
+++ b/src/jvmMain/kotlin/com/insanusmokrassar/sdi/JVMHelperTools.kt
@@ -1,5 +1,6 @@
 package com.insanusmokrassar.sdi
 
+import kotlin.reflect.KClass
 import kotlinx.serialization.ImplicitReflectionSerializer
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.modules.SerializersModuleBuilder
@@ -9,23 +10,27 @@ import java.io.InputStream
 @ImplicitReflectionSerializer
 fun Json.loadModule(
     stream: InputStream,
+    vararg additionalClassesToInclude: KClass<*>,
     moduleBuilder: (SerializersModuleBuilder.() -> Unit)? = null
-) = loadModule(stream.reader().readText(), moduleBuilder)
+) = loadModule(stream.reader().readText(), *additionalClassesToInclude, moduleBuilder = moduleBuilder)
 
 @ImplicitReflectionSerializer
 fun loadModule(
     stream: InputStream,
+    vararg additionalClassesToInclude: KClass<*>,
     moduleBuilder: (SerializersModuleBuilder.() -> Unit)? = null
-) = nonStrictJson.loadModule(stream, moduleBuilder)
+) = nonStrictJson.loadModule(stream, *additionalClassesToInclude, moduleBuilder = moduleBuilder)
 
 @ImplicitReflectionSerializer
 fun Json.loadModule(
     file: File,
+    vararg additionalClassesToInclude: KClass<*>,
     moduleBuilder: (SerializersModuleBuilder.() -> Unit)? = null
-) = loadModule(file.inputStream(), moduleBuilder)
+) = loadModule(file.inputStream(), *additionalClassesToInclude, moduleBuilder = moduleBuilder)
 
 @ImplicitReflectionSerializer
 fun loadModule(
     file: File,
+    vararg additionalClassesToInclude: KClass<*>,
     moduleBuilder: (SerializersModuleBuilder.() -> Unit)? = null
-) = nonStrictJson.loadModule(file, moduleBuilder)
+) = nonStrictJson.loadModule(file, *additionalClassesToInclude, moduleBuilder = moduleBuilder)