diff --git a/.github/workflows/build-documentation.yml b/.github/workflows/build-documentation.yml
index e05012a..e97a14a 100644
--- a/.github/workflows/build-documentation.yml
+++ b/.github/workflows/build-documentation.yml
@@ -14,7 +14,7 @@ jobs:
 
     - name: Install dependencies Ubuntu
       run: >
-        sudo apt-get update && sudo apt-get install cmake doxygen
+        sudo apt-get update && sudo apt-get install cmake doxygen python3-sphinx
 
     - name: Configure CMake
       run: >