diff --git a/Jenkinsfile b/Jenkinsfile
index 62e0e4f..53889bd 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -10,7 +10,7 @@ pipeline {
         sh ''' #!/usr/local/bin/bash
           rbenv local 3.2.2
           echo "# frozen_string_literal: true\n" > .env.rb
-          echo "ENV['APP_SESSION_SECRET'] ||= $(ruby -rsecurerandom -e 'puts SecureRandom.base64(64)')" >> .env.rb
+          echo "ENV['APP_SESSION_SECRET'] ||= '$(ruby -rsecurerandom -e 'puts SecureRandom.base64(64)')'" >> .env.rb
           echo "ENV['DB_NAME'] ||= '${DB_NAME}'" >> .env.rb
           cat .env.rb
         '''