diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 3bd843cf..bbcac8b7 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -32,6 +32,7 @@ jobs:
       - name: build doc
         id: build_doc
         run: |
+          git fetch --unshallow # fetch all history
           pip3 install setuptools
           pip3 install teedoc
           ls -al ~/.local/bin/