diff --git a/fastlabel/__init__.py b/fastlabel/__init__.py
index 7f71f3f..93ef0da 100644
--- a/fastlabel/__init__.py
+++ b/fastlabel/__init__.py
@@ -578,7 +578,9 @@ def export_yolo(self, tasks: list, output_dir: str = os.path.join("output", "yol
                 for obj in anno["object"]:
                     f.write(obj)
                     f.write("\n")
-        with open(os.path.join(output_dir, "classes.txt"), 'w', encoding="utf8") as f:
+        classes_file_path = os.path.join(output_dir, "classes.txt")
+        os.makedirs(os.path.dirname(classes_file_path), exist_ok=True)
+        with open(classes_file_path, 'w', encoding="utf8") as f:
             for category in categories:
                 f.write(category["name"])
                 f.write("\n")
diff --git a/setup.py b/setup.py
index 854c2e4..84a93bc 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 
 setuptools.setup(
     name="fastlabel",
-    version="0.9.9",
+    version="0.9.10",
     author="eisuke-ueta",
     author_email="eisuke.ueta@fastlabel.ai",
     description="The official Python SDK for FastLabel API, the Data Platform for AI",