diff --git a/Gemfile b/Gemfile
index 3db6e89..c7ff850 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'sinatra', '~> 1.4', '< 2'
+gem 'sinatra', '~> 3.0'
 gem 'sinatra-contrib'
 gem 'sinatra-cors'
 gem 'sinatra-param'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6245758..fd2b150 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,6 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    backports (3.20.2)
     byebug (11.1.3)
     chef-utils (16.11.7)
     coderay (1.1.3)
@@ -26,6 +25,8 @@ GEM
       chef-utils
     mixlib-versioning (1.1.0)
     multi_json (1.15.0)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
     netrc (0.11.0)
     pry (0.13.1)
       coderay (~> 1.1)
@@ -33,8 +34,8 @@ GEM
     pry-byebug (3.9.0)
       byebug (~> 11.0)
       pry (~> 0.13.0)
-    rack (1.6.13)
-    rack-protection (1.5.5)
+    rack (2.2.6.2)
+    rack-protection (3.0.5)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -69,23 +70,24 @@ GEM
     rspec-support (3.10.3)
     rspec_junit_formatter (0.5.1)
       rspec-core (>= 2, < 4, != 2.12.0)
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
-    sinatra-contrib (1.4.7)
-      backports (>= 2.0)
+    ruby2_keywords (0.0.5)
+    sinatra (3.0.5)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.5)
+      tilt (~> 2.0)
+    sinatra-contrib (3.0.5)
       multi_json
-      rack-protection
-      rack-test
-      sinatra (~> 1.4.0)
-      tilt (>= 1.3, < 3)
+      mustermann (~> 3.0)
+      rack-protection (= 3.0.5)
+      sinatra (= 3.0.5)
+      tilt (~> 2.0)
     sinatra-cors (1.2.0)
     sinatra-param (1.6.0)
       sinatra (>= 1.3)
     statsd-ruby (1.5.0)
     thor (1.1.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
     trashed (3.2.7)
       statsd-ruby (~> 1.1)
     unf (0.1.4)
@@ -115,7 +117,7 @@ DEPENDENCIES
   rspec-legacy_formatters
   rspec-rerun (~> 1.1.0)
   rspec_junit_formatter
-  sinatra (~> 1.4, < 2)
+  sinatra (~> 3.0)
   sinatra-contrib
   sinatra-cors
   sinatra-param