diff --git a/README.md b/README.md
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 # pytti-notebook
 
-[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/pytti-tools/pytti-notebook/blob/main/pytti_5_beta.ipynb)
+[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/pytti-tools/pytti-notebook/blob/main/pyttitools-PYTTI.ipynb)
 
 
 Start here