diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 806a74a..37e3f4d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -93,7 +93,7 @@ jobs:
       if: ${{ steps.cache-nb.outputs.cache-hit != 'true' }}
       run: |
         mkdir -p ${{ env.NBCACHE }}/docs
-        cp - r docs/data ${{ env.NBCACHE }}/docs/
+        cp -r docs/data ${{ env.NBCACHE }}/docs/
         julia --project=@. --color=yes -p ${{ env.LITERATE_PROC }} ci.jl
     - name: Copy back built notebooks
       run: cp --verbose -rf ${{ env.NBCACHE }}/docs/* docs/