diff --git a/content/Building Systems with the ChatGPT API/9.Evaluation-part1.ipynb b/content/Building Systems with the ChatGPT API/9.Evaluation-part1.ipynb
index 6541890..05ba75d 100644
--- a/content/Building Systems with the ChatGPT API/9.Evaluation-part1.ipynb	
+++ b/content/Building Systems with the ChatGPT API/9.Evaluation-part1.ipynb	
@@ -84,7 +84,7 @@
     "import utils_en\n",
     "import utils_ch\n",
     "\n",
-    "openai.api_key  = \"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\""
+    "openai.api_key  = \"your_key\""
    ]
   },
   {