diff --git a/Gemfile b/Gemfile
index 9e82a0e..deab38f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
 
 gem "puma", "~> 6.6"
 
-gem "sinatra", "~> 4.1"
+gem "sinatra", "~> 4.2"
 
 gem "cowsay", "~> 0.3.0"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index c43125a..74f339c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,13 +4,13 @@ GEM
     base64 (0.3.0)
     cowsay (0.3.0)
     logger (1.7.0)
-    mustermann (3.0.3)
+    mustermann (3.0.4)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.7.4)
     puma (6.6.0)
       nio4r (~> 2.0)
-    rack (3.1.16)
-    rack-protection (4.1.1)
+    rack (3.2.3)
+    rack-protection (4.2.1)
       base64 (>= 0.1.0)
       logger (>= 1.6.0)
       rack (>= 3.0.0, < 4)
@@ -20,11 +20,11 @@ GEM
     rackup (2.2.1)
       rack (>= 3)
     ruby2_keywords (0.0.5)
-    sinatra (4.1.1)
+    sinatra (4.2.1)
       logger (>= 1.6.0)
       mustermann (~> 3.0)
       rack (>= 3.0.0, < 4)
-      rack-protection (= 4.1.1)
+      rack-protection (= 4.2.1)
       rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
     tilt (2.6.1)
@@ -37,7 +37,7 @@ DEPENDENCIES
   cowsay (~> 0.3.0)
   puma (~> 6.6)
   rackup (~> 2.2)
-  sinatra (~> 4.1)
+  sinatra (~> 4.2)
 
 RUBY VERSION
    ruby 3.4.5p51