diff --git a/Gemfile b/Gemfile
index 2495beb..459831c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,5 +6,5 @@ gem "sinatra-contrib", "~> 1.4.7"
 gem "rack", "~> 1.6.4"
 gem "sass", "~> 3.4.22"
 gem "coffee-script", "~> 2.4.1"
-gem "sprockets", "~> 3.6.0"
+gem "sprockets", "~> 3.7.2"
 gem "chronic", "~> 0.10.2"
diff --git a/Gemfile.lock b/Gemfile.lock
index af948cc..8862e71 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,7 +7,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.10.0)
-    concurrent-ruby (1.0.2)
+    concurrent-ruby (1.2.2)
     execjs (2.7.0)
     multi_json (1.12.1)
     rack (1.6.4)
@@ -27,7 +27,7 @@ GEM
       rack-test
       sinatra (~> 1.4.0)
       tilt (>= 1.3, < 3)
-    sprockets (3.6.0)
+    sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     tilt (2.0.4)
@@ -42,7 +42,7 @@ DEPENDENCIES
   sass (~> 3.4.22)
   sinatra (~> 1.4.7)
   sinatra-contrib (~> 1.4.7)
-  sprockets (~> 3.6.0)
+  sprockets (~> 3.7.2)
 
 BUNDLED WITH
    1.11.2