diff --git a/Controllers/XWebinarServiceControllerBase.cs b/Controllers/XWebinarServiceControllerBase.cs
index b344218..7b16b97 100644
--- a/Controllers/XWebinarServiceControllerBase.cs
+++ b/Controllers/XWebinarServiceControllerBase.cs
@@ -952,7 +952,7 @@ namespace xWebinarService.Controllers
         /// <param name="id"></param>
         /// <param name="ids"></param>
         /// <returns></returns>
-        [HttpGet("{id}/Files/AttachMany")]
+        [HttpPost("{id}/Files/AttachMany")]
         public virtual async Task<ActionResult> AttachFiles(
             [FromRoute] Guid id,
             [FromQuery] string ids
@@ -992,7 +992,7 @@ namespace xWebinarService.Controllers
         /// <param name="id"></param>
         /// <param name="ids">if null, detach all files ...</param>
         /// <returns></returns>
-        [HttpGet("{id}/Files/DetachMany")]
+        [HttpDelete("{id}/Files/DetachMany")]
         public virtual async Task<ActionResult> DetachFiles(
             [FromRoute] Guid id,
             [FromQuery] string ids = null
diff --git a/Interfaces/IXWebinarServiceControllerActions.cs b/Interfaces/IXWebinarServiceControllerActions.cs
index 0e3477b..ed19808 100644
--- a/Interfaces/IXWebinarServiceControllerActions.cs
+++ b/Interfaces/IXWebinarServiceControllerActions.cs
@@ -220,7 +220,7 @@ namespace xWebinarService.Interfaces
         /// <param name="id"></param>
         /// <param name="ids"></param>
         /// <returns></returns>
-        [HttpGet("{id}/Files/AttachMany")]
+        [HttpPost("{id}/Files/AttachMany")]
         Task<ActionResult> AttachFiles(
             [FromRoute] Guid id,
             [FromQuery] string ids
@@ -232,7 +232,7 @@ namespace xWebinarService.Interfaces
         /// <param name="id"></param>
         /// <param name="ids">if null, detach all files ...</param>
         /// <returns></returns>
-        [HttpGet("{id}/Files/DetachMany")]
+        [HttpDelete("{id}/Files/DetachMany")]
         Task<ActionResult> DetachFiles(
             [FromRoute] Guid id,
             [FromQuery] string ids = null