diff --git a/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/post/api/ReadPostsAPI.kt b/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/post/api/ReadPostsAPI.kt
index 4d33e34e..9e566c83 100644
--- a/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/post/api/ReadPostsAPI.kt
+++ b/postssystem.core/src/commonMain/kotlin/com/insanusmokrassar/postssystem/core/post/api/ReadPostsAPI.kt
@@ -36,7 +36,7 @@ interface ReadPostsAPI {
     /**
      * @return all posts by pages basing on their creation date
      */
-    suspend fun getPostsByPagination(pagination: Pagination): PaginationResult<out RegisteredPost>
+    suspend fun getPostsByPagination(pagination: Pagination): PaginationResult<RegisteredPost>
 }
 
 suspend fun ReadPostsAPI.getPostsByCreatingDates(
diff --git a/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryPostsAPI.kt b/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryPostsAPI.kt
index ce36a13f..9e9408de 100644
--- a/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryPostsAPI.kt
+++ b/postssystem.core/src/commonTest/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryPostsAPI.kt
@@ -76,7 +76,7 @@ class InMemoryPostsAPI(
 
     override suspend fun getPostsByPagination(
         pagination: Pagination
-    ): PaginationResult<out RegisteredPost> = pagination.createResult(
+    ): PaginationResult<RegisteredPost> = pagination.createResult(
         commonObjectsNumber = posts.size,
         results = sortedByDatePosts.subList(
             pagination.firstIndex,
diff --git a/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedPostsAPI.kt b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedPostsAPI.kt
index 135ccb4e..e1d1447a 100644
--- a/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedPostsAPI.kt
+++ b/postssystem.exposed/src/main/kotlin/com/insanusmokrassar/postssystem/core/exposed/ExposedPostsAPI.kt
@@ -158,7 +158,7 @@ private class PostsAPIDatabaseTable(
         }
     }
 
-    override suspend fun getPostsByPagination(pagination: Pagination): PaginationResult<out RegisteredPost> {
+    override suspend fun getPostsByPagination(pagination: Pagination): PaginationResult<RegisteredPost> {
         return transaction {
             val posts = selectAll().limit(pagination.size, pagination.firstIndex).orderBy(creationDateColumn).map {
                 it.toRegisteredPost()