diff --git a/Gemfile b/Gemfile
index 0f5476cd..7d42d54e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ gem 'rails', '~> 7.2.1'
 
 gem 'sprockets-rails'
 
-gem 'rack', '< 3.0'
+gem 'rack', '< 4.0'
 gem 'pg'
 gem 'puma', '~> 6.0'
 gem 'rugged', '1.7.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index c7507462..dba2ad8b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -160,14 +160,14 @@ GEM
     puma (6.6.1)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (2.2.17)
-    rack-session (1.0.2)
-      rack (< 3)
+    rack (3.1.16)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
     rack-test (2.2.0)
       rack (>= 1.3)
-    rackup (1.0.0)
-      rack (< 3)
-      webrick
+    rackup (2.2.1)
+      rack (>= 3)
     rails (7.2.2.2)
       actioncable (= 7.2.2.2)
       actionmailbox (= 7.2.2.2)
@@ -252,7 +252,6 @@ GEM
       activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
       railties (>= 6.0.0)
-    webrick (1.8.2)
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -272,7 +271,7 @@ DEPENDENCIES
   ed25519
   pg
   puma (~> 6.0)
-  rack (< 3.0)
+  rack (< 4.0)
   rails (~> 7.2.1)
   rails-controller-testing
   rbnacl (>= 3.2, < 8.0)