diff --git a/ServerPart/src/main/kotlin/com/insanusmokrassar/postssystem/core/server/ReadModules.kt b/ServerPart/src/main/kotlin/com/insanusmokrassar/postssystem/core/server/ReadModules.kt
index 848acf5f..3c8f2b09 100644
--- a/ServerPart/src/main/kotlin/com/insanusmokrassar/postssystem/core/server/ReadModules.kt
+++ b/ServerPart/src/main/kotlin/com/insanusmokrassar/postssystem/core/server/ReadModules.kt
@@ -20,7 +20,7 @@ import org.joda.time.DateTime
 
 fun Route.includePostsCoreReadModules(readPostsAPI: ReadPostsAPI) {
     post(getPostByIdAddress) {
-        call.receiveOrNull(PostId::class) ?.also { id ->
+        call.receiveOrNull<PostId>() ?.also { id ->
             val post = readPostsAPI.getPostById(id)
             post ?.let {
                 val simplePost = post.asSimplePost
@@ -29,7 +29,7 @@ fun Route.includePostsCoreReadModules(readPostsAPI: ReadPostsAPI) {
         } ?: call.answerBadRequest("Id of post")
     }
     post(getPostsByContentIdAddress) {
-        call.receiveOrNull(ContentId::class) ?.also { id ->
+        call.receiveOrNull<ContentId>() ?.also { id ->
             val posts = readPostsAPI.getPostsByContent(id)
             val simplePosts = posts.asSimplePostList
             call.answer(postsSerializer, simplePosts)