diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0301e2b..ce9fd17 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.0.2
+          ruby-version: 3.1.1
       - name: Install dependencies
         run: bundle install
       - name: Run tests
diff --git a/.ruby-version b/.ruby-version
index b502146..94ff29c 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.0.2
+3.1.1
diff --git a/Gemfile.lock b/Gemfile.lock
index 7bef762..2ae5df4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,19 +1,18 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (6.1.4.1)
+    activesupport (7.0.2.2)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
       tzinfo (~> 2.0)
-      zeitwerk (~> 2.3)
     byebug (11.1.3)
     concurrent-ruby (1.1.9)
-    diff-lcs (1.4.4)
+    diff-lcs (1.5.0)
     dotenv (2.7.6)
-    i18n (1.8.10)
+    i18n (1.10.0)
       concurrent-ruby (~> 1.0)
-    minitest (5.14.4)
+    minitest (5.15.0)
     multi_json (1.15.0)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
@@ -21,52 +20,52 @@ GEM
     puma (5.6.2)
       nio4r (~> 2.0)
     rack (2.2.3)
-    rack-attack (6.5.0)
+    rack-attack (6.6.0)
       rack (>= 1.0, < 3)
-    rack-protection (2.1.0)
+    rack-protection (2.2.0)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    redis (4.4.0)
-    redis-activesupport (5.2.1)
-      activesupport (>= 3, < 7)
+    redis (4.6.0)
+    redis-activesupport (5.3.0)
+      activesupport (>= 3, < 8)
       redis-store (>= 1.3, < 2)
-    redis-store (1.9.0)
+    redis-store (1.9.1)
       redis (>= 4, < 5)
-    rspec (3.10.0)
-      rspec-core (~> 3.10.0)
-      rspec-expectations (~> 3.10.0)
-      rspec-mocks (~> 3.10.0)
-    rspec-core (3.10.1)
-      rspec-support (~> 3.10.0)
-    rspec-expectations (3.10.1)
+    rspec (3.11.0)
+      rspec-core (~> 3.11.0)
+      rspec-expectations (~> 3.11.0)
+      rspec-mocks (~> 3.11.0)
+    rspec-core (3.11.0)
+      rspec-support (~> 3.11.0)
+    rspec-expectations (3.11.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.10.0)
-    rspec-mocks (3.10.2)
+      rspec-support (~> 3.11.0)
+    rspec-mocks (3.11.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.10.0)
-    rspec-support (3.10.2)
+      rspec-support (~> 3.11.0)
+    rspec-support (3.11.0)
     ruby2_keywords (0.0.5)
-    sinatra (2.1.0)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
       rack (~> 2.2)
-      rack-protection (= 2.1.0)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
-    sinatra-contrib (2.1.0)
+    sinatra-contrib (2.2.0)
       multi_json
       mustermann (~> 1.0)
-      rack-protection (= 2.1.0)
-      sinatra (= 2.1.0)
+      rack-protection (= 2.2.0)
+      sinatra (= 2.2.0)
       tilt (~> 2.0)
     sinatra-reloader (1.0)
       sinatra-contrib
     tilt (2.0.10)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
-    zeitwerk (2.4.2)
 
 PLATFORMS
   arm64-darwin-20
+  arm64-darwin-21
   x86_64-darwin-20
   x86_64-linux
 
@@ -82,7 +81,7 @@ DEPENDENCIES
   sinatra-reloader (~> 1.0)
 
 RUBY VERSION
-   ruby 3.0.2p107
+   ruby 3.1.1p18
 
 BUNDLED WITH
-   2.2.22
+   2.3.8