diff --git a/lib/octicons_gem/octicons.gemspec b/lib/octicons_gem/octicons.gemspec
index 5acad64c7..bc950f144 100644
--- a/lib/octicons_gem/octicons.gemspec
+++ b/lib/octicons_gem/octicons.gemspec
@@ -10,6 +10,6 @@ Gem::Specification.new do |s|
   s.email       = ["support@openproject.com"]
   s.files       = Dir["{lib}/**/*"] + ["LICENSE", "README.md"]
   s.homepage    = "https://github.com/opf/openproject-octicons"
-  s.metadata    = { "rubygems_mfa_required" => 'false' }
+  s.metadata    = { "rubygems_mfa_required" => "false" }
   s.license     = "MIT"
 end