diff --git a/graphrag/llm/openai/openai_completion_llm.py b/graphrag/llm/openai/openai_completion_llm.py
index bdbac6c1..74511c02 100644
--- a/graphrag/llm/openai/openai_completion_llm.py
+++ b/graphrag/llm/openai/openai_completion_llm.py
@@ -39,5 +39,5 @@ class OpenAICompletionLLM(BaseLLM[CompletionInput, CompletionOutput]):
         args = get_completion_llm_args(
             kwargs.get("model_parameters"), self.configuration
         )
-        completion = self.client.completions.create(prompt=input, **args)
+        completion = await self.client.completions.create(prompt=input, **args)
         return completion.choices[0].text