diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 00bb32b..256352a 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -21,4 +21,5 @@ jobs:
       - name: Build and deploy
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}
         run: julia --project=docs/ docs/make.jl
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