diff --git a/README.md b/README.md
index 28ccca2..d71d322 100644
--- a/README.md
+++ b/README.md
@@ -432,6 +432,10 @@ task = client.create_multi_image_task(
 )
 ```
 
+##### Limitation
+
+* You can upload up to 250 files in total.
+
 #### Find Task
 
 Find a single task.
diff --git a/fastlabel/__init__.py b/fastlabel/__init__.py
index f02b358..f19a83a 100644
--- a/fastlabel/__init__.py
+++ b/fastlabel/__init__.py
@@ -481,6 +481,11 @@ def create_multi_image_task(
             if not utils.is_image_supported_ext(file_path):
                 raise FastLabelInvalidException(
                     "Supported extensions are png, jpg, jpeg.", 422)
+
+            if len(contents) == 250:
+                raise FastLabelInvalidException(
+                    "The count of files should be under 250", 422)
+
             file = utils.base64_encode(file_path)
             contents.append({
                 "name": os.path.basename(file_path),