diff --git a/Gemfile.lock b/Gemfile.lock
index 488e3926..ab88b995 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -69,7 +69,7 @@ GEM
       byebug (~> 11.0)
       pry (>= 0.13, < 0.15)
     public_suffix (5.0.0)
-    rack (2.2.4)
+    rack (3.1.6)
     rack-test (2.0.2)
       rack (>= 1.3)
     rainbow (3.1.1)
@@ -142,6 +142,7 @@ GEM
 
 PLATFORMS
   x86_64-darwin-21
+  x86_64-linux
 
 DEPENDENCIES
   byebug
@@ -156,7 +157,7 @@ DEPENDENCIES
   overcommit (~> 0.58)
   pry
   pry-byebug
-  rack (~> 2.0)
+  rack (~> 3.1)
   rack-test
   rake (~> 13.0)
   redcarpet
diff --git a/oauth.gemspec b/oauth.gemspec
index 8be11dc1..de347561 100644
--- a/oauth.gemspec
+++ b/oauth.gemspec
@@ -83,7 +83,7 @@ Thanks, |7eter l-|. l3oling
   spec.add_development_dependency("iconv")
   spec.add_development_dependency("minitest", "~> 5.15.0")
   spec.add_development_dependency("mocha")
-  spec.add_development_dependency("rack", "~> 2.0")
+  spec.add_development_dependency("rack", "~> 3.1")
   spec.add_development_dependency("rack-test")
   spec.add_development_dependency("rake", "~> 13.0")
   spec.add_development_dependency("rest-client")