diff --git a/src/unstract/sdk/__init__.py b/src/unstract/sdk/__init__.py
index 9a64f41..6b09ee3 100644
--- a/src/unstract/sdk/__init__.py
+++ b/src/unstract/sdk/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "0.56.0rc3"
+__version__ = "0.56.0rc4"
 
 
 def get_sdk_version():
diff --git a/src/unstract/sdk/tool/validator.py b/src/unstract/sdk/tool/validator.py
index deb6efa..28a5df9 100644
--- a/src/unstract/sdk/tool/validator.py
+++ b/src/unstract/sdk/tool/validator.py
@@ -210,7 +210,7 @@ def _validate_file_type(self, input_file: Path) -> None:
             allowed_mimes.append(EXT_MIME_MAP[ext])
         if self.tool.workflow_filestorage:
             tool_fs = self.tool.workflow_filestorage
-            input_file_mime = tool_fs.mime_type(input_file=input_file)
+            input_file_mime = tool_fs.mime_type(input_file)
         else:
             input_file_mime = ToolUtils.get_file_mime_type(input_file=input_file)
         self.tool.stream_log(f"Input file MIME: {input_file_mime}")