diff --git a/step01_llm_app_dev/L1-Model_promt_parser.ipynb b/step01_llm_app_dev/L1-Model_promt_parser.ipynb
index af9fc9e9..3f497efe 100644
--- a/step01_llm_app_dev/L1-Model_promt_parser.ipynb
+++ b/step01_llm_app_dev/L1-Model_promt_parser.ipynb
@@ -60,7 +60,7 @@
     "\n",
     "    # https://platform.openai.com/docs/guides/gpt/chat-completions-api\n",
     "    # https://cookbook.openai.com/examples/how_to_format_inputs_to_chatgpt_models#2-an-example-chat-api-call\n",
-    "    response: Iterator  = openai.ChatCompletion.create(\n",
+    "    response: Iterator  = openai.chat.completions.create(\n",
     "        model=model,\n",
     "        messages=messages,\n",
     "        temperature=0, \n",