diff --git a/python/sglang/srt/model_executor/cuda_graph_runner.py b/python/sglang/srt/model_executor/cuda_graph_runner.py
index 14da84e42..8cab1b69f 100644
--- a/python/sglang/srt/model_executor/cuda_graph_runner.py
+++ b/python/sglang/srt/model_executor/cuda_graph_runner.py
@@ -100,6 +100,7 @@ def freeze_gc(enable_cudagraph_gc: bool):
     finally:
         if should_freeze:
             gc.unfreeze()
+            gc.collect()
 
 
 def _to_torch(model: torch.nn.Module, reverse: bool, num_tokens: int):