diff --git a/dev-tools/scripts/jenkins.build.ref.guide.sh b/dev-tools/scripts/jenkins.build.ref.guide.sh
index b00252f41f7..85144569090 100755
--- a/dev-tools/scripts/jenkins.build.ref.guide.sh
+++ b/dev-tools/scripts/jenkins.build.ref.guide.sh
@@ -60,6 +60,7 @@ echoRun "rvm $RUBY_VERSION@$GEMSET"      # Activate this project's gemset
 
 # Install gems in the gemset.  Param --force disables dependency conflict detection.
 echoRun "gem install --force --version 3.5.0 jekyll"
+echoRun "gem uninstall asciidoctor"      # Get rid of all versions
 echoRun "gem install --force --version 1.5.6.2 asciidoctor"
 echoRun "gem install --force --version 2.1.0 jekyll-asciidoc"
 echoRun "gem install --force --version 1.1.2 pygments.rb"