diff --git a/Gemfile b/Gemfile
index 356aea0..824bb54 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 gem 'unicorn', '5.4.0'
-gem 'sinatra', '2.0.1'
+gem 'sinatra', '2.0.3'
 
 group :development do
   gem 'shotgun', '0.9.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index f4f5462..397d482 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,18 +10,18 @@ GEM
     kgio (2.11.2)
     libv8 (3.16.14.19)
     mustermann (1.0.2)
-    rack (2.0.4)
-    rack-protection (2.0.1)
+    rack (2.0.5)
+    rack-protection (2.0.3)
       rack
     raindrops (0.19.0)
     rake (10.3.2)
     ref (2.0.0)
     shotgun (0.9.2)
       rack (>= 1.0)
-    sinatra (2.0.1)
+    sinatra (2.0.3)
       mustermann (~> 1.0)
       rack (~> 2.0)
-      rack-protection (= 2.0.1)
+      rack-protection (= 2.0.3)
       tilt (~> 2.0)
     therubyracer (0.12.3)
       libv8 (~> 3.16.14.15)
@@ -41,7 +41,7 @@ DEPENDENCIES
   cssminify (= 1.0.2)
   rake (~> 10.3)
   shotgun (= 0.9.2)
-  sinatra (= 2.0.1)
+  sinatra (= 2.0.3)
   therubyracer (= 0.12.3)
   uglifier (= 4.1.6)
   unicorn (= 5.4.0)