diff --git a/Gemfile b/Gemfile
index 786661f..a94f176 100644
--- a/Gemfile
+++ b/Gemfile
@@ -26,7 +26,7 @@ gem 'sdoc', '~> 0.4.0',          group: :doc
 gem 'web-console', '~> 2.0', group: :development
 
 # Use Coveralls for coverage documentation
-gem 'coveralls', require: false
+gem 'coveralls', '~> 0.7.2', require: false
 
 gem 'bootstrap-sass', '~> 3.3.1'
 gem 'autoprefixer-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index d81d2db..af5bdc7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -54,17 +54,16 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.8.0)
-    coveralls (0.7.1)
+    coveralls (0.7.2)
       multi_json (~> 1.3)
-      rest-client
+      rest-client (= 1.6.7)
       simplecov (>= 0.7)
-      term-ansicolor
-      thor
+      term-ansicolor (= 1.2.2)
+      thor (= 0.18.1)
     debug_inspector (0.0.2)
     docile (1.1.5)
     erubis (2.7.0)
     execjs (2.2.2)
-    ffi (1.9.6)
     globalid (0.3.0)
       activesupport (>= 4.1.0)
     hike (1.2.3)
@@ -86,7 +85,6 @@ GEM
     mini_portile (0.6.2)
     minitest (5.5.0)
     multi_json (1.10.1)
-    netrc (0.10.2)
     nokogiri (1.6.5)
       mini_portile (~> 0.6.0)
     rack (1.6.0)
@@ -119,10 +117,8 @@ GEM
     rake (10.4.2)
     rdoc (4.1.2)
       json (~> 1.4)
-    rest-client (1.7.2)
-      ffi (~> 1.9)
-      mime-types (>= 1.16, < 3.0)
-      netrc (~> 0.7)
+    rest-client (1.6.7)
+      mime-types (>= 1.16)
     sass (3.2.19)
     sass-rails (4.0.5)
       railties (>= 4.0.0, < 5.0)
@@ -147,12 +143,12 @@ GEM
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
     sqlite3 (1.3.10)
-    term-ansicolor (1.3.0)
-      tins (~> 1.0)
-    thor (0.19.1)
+    term-ansicolor (1.2.2)
+      tins (~> 0.8)
+    thor (0.18.1)
     thread_safe (0.3.4)
     tilt (1.4.1)
-    tins (1.3.3)
+    tins (0.13.2)
     turbolinks (2.5.2)
       coffee-rails
     tzinfo (1.2.2)
@@ -179,7 +175,7 @@ DEPENDENCIES
   bh (~> 1.2)
   bootstrap-sass (~> 3.3.1)
   coffee-rails (~> 4.1.0)
-  coveralls
+  coveralls (~> 0.7.2)
   jbuilder (~> 2.0)
   jquery-rails
   mathjax-rails