diff --git a/.github/workflows/build-release-docs.yaml b/.github/workflows/build-release-docs.yaml
index cf12fffa9..ed9d81b41 100644
--- a/.github/workflows/build-release-docs.yaml
+++ b/.github/workflows/build-release-docs.yaml
@@ -32,6 +32,7 @@ jobs:
 
       - name: Install Asciidoctor-PDF
         run: |
+          gem install public_suffix -v 5.1.1
           gem install asciidoctor-pdf
           asciidoctor-pdf --version