diff --git a/enju_loc.gemspec b/enju_loc.gemspec
index 6d421b9..95deacb 100755
--- a/enju_loc.gemspec
+++ b/enju_loc.gemspec
@@ -31,4 +31,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency "coveralls"
   s.add_development_dependency "appraisal"
   s.add_development_dependency "rails", "~> 5.2"
+  s.add_development_dependency "sprockets", "~> 3.7"
 end