diff --git a/Gemfile b/Gemfile
index 1eba16a18..52a1d1c67 100644
--- a/Gemfile
+++ b/Gemfile
@@ -47,5 +47,5 @@ gem "compass"
 gem "susy"
 gem "breakpoint"
 
-gem "bootstrap-sass", "~> 3.3.5", :require => false
+gem "bootstrap-sass", "~> 3.4.1", :require => false
 gem "jquery-middleman"
diff --git a/Gemfile.lock b/Gemfile.lock
index f93ed6e9c..6ac5d70a2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -25,9 +25,9 @@ GEM
     babel-transpiler (0.7.0)
       babel-source (>= 4.0, < 6)
       execjs (~> 2.0)
-    bootstrap-sass (3.3.7)
+    bootstrap-sass (3.4.1)
       autoprefixer-rails (>= 5.2.1)
-      sass (>= 3.3.4)
+      sassc (>= 2.0.0)
     breakpoint (2.7.1)
       sass (~> 3.3)
       sassy-maps (< 1.0.0)
@@ -161,6 +161,10 @@ GEM
     ref (2.0.0)
     rouge (1.11.1)
     sass (3.4.25)
+    sassc (2.2.1)
+      ffi (~> 1.9)
+    sassc (2.2.1-x64-mingw32)
+      ffi (~> 1.9)
     sassy-maps (0.4.0)
       sass (~> 3.3)
     sprockets (2.12.5)
@@ -198,7 +202,7 @@ PLATFORMS
   x64-mingw32
 
 DEPENDENCIES
-  bootstrap-sass (~> 3.3.5)
+  bootstrap-sass (~> 3.4.1)
   breakpoint
   compass
   jquery-middleman