diff --git a/rubygem-uglifier.spec b/rubygem-uglifier.spec
index 721f2bd..077f2bc 100644
--- a/rubygem-uglifier.spec
+++ b/rubygem-uglifier.spec
@@ -3,7 +3,7 @@
 
 Name: rubygem-%{gem_name}
 Version: 3.0.2
-Release: 1%{?dist}
+Release: 2%{?dist}
 Summary: Ruby wrapper for UglifyJS JavaScript compressor
 Group: Development/Languages
 # lib/source-map.js is BSD.
@@ -53,8 +53,8 @@ gem unpack %{SOURCE0}
 gem spec %{SOURCE0} -l --ruby > %{gem_name}.gemspec
 
 %patch1 -p1
-sed -i '/files/ s|"lib/es5.js", ||' %{gem_name}.gemspec
-sed -i '/files/ s|"lib/split.js", ||' %{gem_name}.gemspec
+sed -i '/files/ s|"lib/es5.js".freeze, ||' %{gem_name}.gemspec
+sed -i '/files/ s|"lib/split.js".freeze, ||' %{gem_name}.gemspec
 
 # Explicitly removing the file.
 rm lib/uglify.js
@@ -106,6 +106,9 @@ popd
 %{gem_instdir}/%{gem_name}.gemspec
 
 %changelog
+* Mon Dec 05 2016 Jun Aruga <jaruga@redhat.com> - 3.0.2-2
+- Fix FTBFS due to updated RubyGems.
+
 * Thu Oct 13 2016 Vít Ondruch <vondruch@redhat.com> - 3.0.2-1
 - Update to Uglifier 3.0.2.