diff --git a/notebook/BELLE_INFER_COLAB.ipynb b/notebook/BELLE_INFER_COLAB.ipynb
index ada5917b..42294aa2 100644
--- a/notebook/BELLE_INFER_COLAB.ipynb
+++ b/notebook/BELLE_INFER_COLAB.ipynb
@@ -211,7 +211,7 @@
         }
       ],
       "source": [
-        "!!pip install -r requirements.txt"
+        "!pip install -r requirements.txt"
       ]
     },
     {