diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index ebc230b2..cdf8c724 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -14,6 +14,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          # Full history: the deploy script diffs github.event.before..sha to
+          # find which files changed in this push. Shallow (depth-1, the default)
+          # clones don't contain the before commit, so that diff would 128.
+          fetch-depth: 0
 
       - name: Deploy changed files to WebDAV
         env: