diff --git a/Gemfile b/Gemfile
index 5435ca6..6e37646 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,8 +7,8 @@ ruby '2.6.1'
 gem 'dry-auto_inject'
 gem 'faraday'
 gem 'puma', '>= 3.12', '< 5.0'
-gem 'sinatra', '~> 2.0'
-gem 'sinatra-contrib', '~> 2.0'
+gem 'sinatra', '~> 3.0'
+gem 'sinatra-contrib', '~> 3.0'
 
 group :development, :test do
   gem 'guard'
diff --git a/Gemfile.lock b/Gemfile.lock
index 50fd994..97c59ad 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,6 @@ GEM
     addressable (2.6.0)
       public_suffix (>= 2.0.2, < 4.0)
     ast (2.4.0)
-    backports (3.15.0)
     byebug (11.0.1)
     coderay (1.1.2)
     concurrent-ruby (1.1.5)
@@ -56,9 +55,10 @@ GEM
       ruby_dep (~> 1.2)
     lumberjack (1.0.13)
     method_source (0.9.2)
-    multi_json (1.13.1)
+    multi_json (1.15.0)
     multipart-post (2.1.1)
-    mustermann (1.0.3)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
     nenv (0.3.0)
     nio4r (2.5.2)
     notiffany (0.1.3)
@@ -76,8 +76,8 @@ GEM
     public_suffix (3.1.1)
     puma (4.3.1)
       nio4r (~> 2.0)
-    rack (2.0.8)
-    rack-protection (2.0.5)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -110,6 +110,7 @@ GEM
     rubocop-rspec (1.35.0)
       rubocop (>= 0.60.0)
     ruby-progressbar (1.10.1)
+    ruby2_keywords (0.0.5)
     ruby_dep (1.5.0)
     safe_yaml (1.0.5)
     shellany (0.0.1)
@@ -118,22 +119,21 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    sinatra (2.0.5)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.5)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
-    sinatra-contrib (2.0.5)
-      backports (>= 2.8.2)
+    sinatra-contrib (3.0.4)
       multi_json
-      mustermann (~> 1.0)
-      rack-protection (= 2.0.5)
-      sinatra (= 2.0.5)
-      tilt (>= 1.3, < 3)
+      mustermann (~> 3.0)
+      rack-protection (= 3.0.4)
+      sinatra (= 3.0.4)
+      tilt (~> 2.0)
     spoon (0.0.6)
       ffi
     thor (0.20.3)
-    tilt (2.0.9)
+    tilt (2.0.11)
     unicode-display_width (1.6.0)
     webmock (3.6.2)
       addressable (>= 2.3.6)
@@ -162,8 +162,8 @@ DEPENDENCIES
   rubocop-performance
   rubocop-rspec
   simplecov
-  sinatra (~> 2.0)
-  sinatra-contrib (~> 2.0)
+  sinatra (~> 3.0)
+  sinatra-contrib (~> 3.0)
   webmock
   yard
   yard-sinatra