diff --git a/core/api/src/commonMain/kotlin/dev/inmo/postssystem/core/content/Content.kt b/core/api/src/commonMain/kotlin/dev/inmo/postssystem/core/content/Content.kt
index 2f54b95a..f3e0f65f 100644
--- a/core/api/src/commonMain/kotlin/dev/inmo/postssystem/core/content/Content.kt
+++ b/core/api/src/commonMain/kotlin/dev/inmo/postssystem/core/content/Content.kt
@@ -1,10 +1,7 @@
 package dev.inmo.postssystem.core.content
 
-import dev.inmo.micro_utils.common.ByteArrayAllocator
-import dev.inmo.micro_utils.common.ByteArrayAllocatorSerializer
-import dev.inmo.micro_utils.mime_types.KnownMimeTypes
-import dev.inmo.micro_utils.mime_types.MimeType
 import kotlinx.serialization.Serializable
+import kotlinx.serialization.modules.*
 
 typealias ContentId = String
 
@@ -23,6 +20,14 @@ data class OtherContentLinkContent(
 ) : Content
 
 
+fun SerializersModuleBuilder.includeContentsSerializers(
+    block: PolymorphicModuleBuilder<Content>.() -> Unit
+) {
+    polymorphic(Content::class) {
+        subclass(OtherContentLinkContent::class, OtherContentLinkContent.serializer())
+        block()
+    }
+}
 
 /**
  * Content which is already registered in database. Using its [id] you can retrieve all known