diff --git a/.github/workflows/generate-docs.yml b/.github/workflows/generate-docs.yml
index f3480f4ac4..5dbf20e479 100644
--- a/.github/workflows/generate-docs.yml
+++ b/.github/workflows/generate-docs.yml
@@ -77,6 +77,7 @@ jobs:
         uses: hendrikmuhs/ccache-action@v1.2
         with:
           key: 'docs-gen-${{ github.job }}'
+          max-size: '2000M'
 
       - name: Configure
         run: ./configure --disable-broker-tests --disable-cpp-tests --ccache