diff --git a/05-api-consumption/02-sinatra-web-app/Gemfile b/05-api-consumption/02-sinatra-web-app/Gemfile
index 54e03dd..ba76235 100644
--- a/05-api-consumption/02-sinatra-web-app/Gemfile
+++ b/05-api-consumption/02-sinatra-web-app/Gemfile
@@ -3,5 +3,5 @@ source "https://rubygems.org"
 
 git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
 
-gem "sinatra", "~> 2.0"
+gem "sinatra", "~> 2.2"
 gem "sinatra-contrib", "~> 2.0"
diff --git a/05-api-consumption/02-sinatra-web-app/Gemfile.lock b/05-api-consumption/02-sinatra-web-app/Gemfile.lock
index 17c1d07..94ac639 100644
--- a/05-api-consumption/02-sinatra-web-app/Gemfile.lock
+++ b/05-api-consumption/02-sinatra-web-app/Gemfile.lock
@@ -1,31 +1,31 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    backports (3.15.0)
     multi_json (1.13.1)
-    mustermann (1.0.3)
-    rack (2.2.3)
-    rack-protection (2.0.7)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
-    sinatra (2.0.7)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.7)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    sinatra-contrib (2.0.7)
-      backports (>= 2.8.2)
+    sinatra-contrib (2.2.3)
       multi_json
-      mustermann (~> 1.0)
-      rack-protection (= 2.0.7)
-      sinatra (= 2.0.7)
+      mustermann (~> 2.0)
+      rack-protection (= 2.2.3)
+      sinatra (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.9)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  sinatra (~> 2.0)
+  sinatra (~> 2.2)
   sinatra-contrib (~> 2.0)
 
 BUNDLED WITH