diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index bb69bf3..e472df9 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -25,4 +25,4 @@ jobs:
       - uses: ammaraskar/sphinx-action@0.4
         with:
           docs-folder: "doc/"
-          pre-build-command: "apt-get update -y && apt-get install -y git"
\ No newline at end of file
+          pre-build-command: "apt-get update -y && apt-get install -y git sphinx"
\ No newline at end of file