diff --git a/Gemfile b/Gemfile
index 3ce71c0..817adf9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'sinatra', '~> 2.0.1'
+gem 'sinatra', '~> 2.2.3'
 gem 'haml'
 gem 'bson_ext'
 gem 'bcrypt'
diff --git a/Gemfile.lock b/Gemfile.lock
index f62baeb..25186eb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -28,25 +28,27 @@ GEM
     json (2.1.0)
     mongo (2.4.3)
       bson (>= 4.2.1, < 5.0.0)
-    mustermann (1.0.2)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
     net-ssh (4.1.0)
     puma (3.10.0)
-    rack (2.0.5)
-    rack-protection (2.0.2)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rake (12.0.0)
-    sinatra (2.0.2)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.2)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     sshkit (1.14.0)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
     temple (0.8.0)
-    tilt (2.0.8)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby
@@ -62,7 +64,7 @@ DEPENDENCIES
   json
   mongo
   puma
-  sinatra (~> 2.0.1)
+  sinatra (~> 2.2.3)
 
 BUNDLED WITH
    1.16.1