diff --git a/lib/xcresources/builder/resources_builder.rb b/lib/xcresources/builder/resources_builder.rb
index <HASH>..<HASH> 100644
--- a/lib/xcresources/builder/resources_builder.rb
+++ b/lib/xcresources/builder/resources_builder.rb
@@ -103,9 +103,9 @@ class XCResources::ResourcesBuilder < XCResources::FileBuilder
           struct.section do |section_struct|
             enumerate_keys.call do |key, value, comment|
               if documented?
-                section_struct.writeln "/// %s" % (comment || value) #unless comment.nil?
+                section_struct.writeln '/// %s' % (comment || value) #unless comment.nil?
               end
-              section_struct.writeln "__unsafe_unretained NSString *%s;" % key
+              section_struct.writeln '__unsafe_unretained NSString *%s;' % key
             end
           end
           struct.writeln '} %s;' % section_key
[CodeStyle] Use single quotes instead of double quotes