diff --git a/Gemfile b/Gemfile
index 1cc434a7b..3b3cdc9ce 100644
--- a/Gemfile
+++ b/Gemfile
@@ -29,7 +29,7 @@ gem 'coffee-rails',    '~> 4.1.0'  # coffeescript support
 gem 'turbolinks',      '~> 2.5.3'  # faster page load
 gem 'jquery-rails',    '~> 4.0.3'  # jquery
 gem 'selectize-rails', '~> 0.11.2' # include selectize.js for select
-gem 'therubyracer',  platforms: :ruby
+gem 'therubyracer',    '~> 0.12.2', platforms: :ruby
 gem 'jquery-validation-rails', '~> 1.13.1' # validate on client side
 
 # view helpers
diff --git a/Gemfile.lock b/Gemfile.lock
index 317012473..e55b65976 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -557,7 +557,7 @@ DEPENDENCIES
   simpleidn (~> 0.0.5)
   spring (~> 1.3.3)
   spring-commands-rspec (~> 1.0.4)
-  therubyracer
+  therubyracer (~> 0.12.2)
   traceroute (~> 0.4.0)
   turbolinks (~> 2.5.3)
   uglifier (~> 2.6.1)