diff --git a/Gemfile b/Gemfile
index 7c1cfda..118a1e6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 
 ruby '2.7.0'
 
-gem 'sinatra', '~>2.0.8'
+gem 'sinatra', '~>2.2.3'
 gem 'activerecord', '~>6.0.3'
 gem 'standalone_migrations', '~>6.0.0'
 gem 'pg', '~>1.2.3'
diff --git a/Gemfile.lock b/Gemfile.lock
index 0933768..72a22e5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,7 +43,7 @@ GEM
     minitest (5.14.1)
     minitest-around (0.5.0)
       minitest (~> 5.0)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.2)
     nokogiri (1.10.10)
@@ -51,8 +51,8 @@ GEM
     pg (1.2.3)
     puma (4.3.5)
       nio4r (~> 2.0)
-    rack (2.2.3)
-    rack-protection (2.0.8.1)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -68,11 +68,11 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.20.3, < 2.0)
     rake (13.0.1)
-    ruby2_keywords (0.0.2)
-    sinatra (2.0.8.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     standalone_migrations (6.0.0)
       activerecord (>= 4.2.7, < 6.1.0, != 5.2.3.rc1, != 5.2.3)
@@ -80,7 +80,7 @@ GEM
       rake (>= 10.0)
     thor (1.0.1)
     thread_safe (0.3.6)
-    tilt (2.0.10)
+    tilt (2.0.11)
     tzinfo (1.2.7)
       thread_safe (~> 0.1)
     zeitwerk (2.4.0)
@@ -96,7 +96,7 @@ DEPENDENCIES
   pg (~> 1.2.3)
   puma (~> 4.3.5)
   rack-test (~> 1.1.0)
-  sinatra (~> 2.0.8)
+  sinatra (~> 2.2.3)
   standalone_migrations (~> 6.0.0)
 
 RUBY VERSION