diff --git a/src/opengradient/types.py b/src/opengradient/types.py
index fa89c98..bf25053 100644
--- a/src/opengradient/types.py
+++ b/src/opengradient/types.py
@@ -301,6 +301,12 @@ def __iter__(self):
         """Iterate over stream chunks."""
         return self
 
+    def __aiter__(self):
+        """Return async iterator (required for async for loops)."""
+        if not self._is_async:
+            raise TypeError("Use __iter__ for sync iterators")
+        return self
+
     def __next__(self) -> StreamChunk:
         """Get next stream chunk."""
         import json