diff --git a/Gemfile b/Gemfile
index a6cfe07..0bc1035 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,12 +4,12 @@ source "https://rubygems.org"
 
 git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
 
-gem "sinatra", "2.0.1"
-gem "puma", "4.2.1" 
+gem "sinatra", "2.2.3"
+gem "puma", "4.3.12"
 gem 'puma-metrics'
 
 group :test do
   gem 'rake'
   gem 'rspec'
-  gem 'rack-test'
+  gem 'rack-test', '>= 2.0.0'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index ccc5069..964ab7b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,20 +2,20 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.3)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.2)
-    prometheus-client (0.10.0)
-    puma (4.2.1)
+    nio4r (2.5.9)
+    prometheus-client (4.1.0)
+    puma (4.3.12)
       nio4r (~> 2.0)
-    puma-metrics (1.1.0)
-      prometheus-client (~> 0.10)
+    puma-metrics (1.2.4)
+      prometheus-client (>= 0.10)
       puma (>= 3.0)
-    rack (2.2.2)
-    rack-protection (2.0.1)
+    rack (2.2.6.4)
+    rack-protection (2.2.3)
       rack
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
+    rack-test (2.1.0)
+      rack (>= 1.3)
     rake (13.0.1)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
@@ -30,24 +30,24 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.9.0)
     rspec-support (3.9.2)
-    ruby2_keywords (0.0.2)
-    sinatra (2.0.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.1)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.1.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  puma (= 4.2.1)
+  puma (= 4.3.12)
   puma-metrics
-  rack-test
+  rack-test (>= 2.0.0)
   rake
   rspec
-  sinatra (= 2.0.1)
+  sinatra (= 2.2.3)
 
 BUNDLED WITH
    2.1.4