diff --git a/backend/apps/openai/main.py b/backend/apps/openai/main.py
index 36326430..172332b9 100644
--- a/backend/apps/openai/main.py
+++ b/backend/apps/openai/main.py
@@ -146,6 +146,13 @@ async def proxy(path: str, request: Request, user=Depends(get_verified_user)):
                 body["max_tokens"] = 4000
             print("Modified body_dict:", body)
 
+        # Fix for ChatGPT calls failing because the num_ctx key is in body
+        if "num_ctx" in body:
+            # If 'num_ctx' is in the dictionary, delete it
+            # Leaving it there generates an error with the
+            # OpenAI API (Feb 2024)
+            del body["num_ctx"]
+
         # Convert the modified body back to JSON
         body = json.dumps(body)
     except json.JSONDecodeError as e: