diff --git a/how-to-use-azureml/training/using-environments/using-environments.ipynb b/how-to-use-azureml/training/using-environments/using-environments.ipynb
index 8fb82d5b..992e999e 100644
--- a/how-to-use-azureml/training/using-environments/using-environments.ipynb
+++ b/how-to-use-azureml/training/using-environments/using-environments.ipynb
@@ -129,7 +129,8 @@
         "for env in envs:\n",
         "    if env.startswith(\"AzureML\"):\n",
         "        print(\"Name\",env)\n",
-        "        print(\"packages\", envs[env].python.conda_dependencies.serialize_to_string())"
+        "        if envs[env].python.conda_dependencies is not None:\n",
+        "            print(\"packages\", envs[env].python.conda_dependencies.serialize_to_string())"
       ]
     },
     {