diff --git a/tests/apps/ruby/Gemfile b/tests/apps/ruby/Gemfile
index 37b6c81a2..6c499d2a2 100644
--- a/tests/apps/ruby/Gemfile
+++ b/tests/apps/ruby/Gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
 ruby '2.6.8'
 
-gem 'sinatra', '~>3.0.3'
+gem 'sinatra', '~>3.0.4'
 gem 'thin'
diff --git a/tests/apps/ruby/Gemfile.lock b/tests/apps/ruby/Gemfile.lock
index 41929e992..e72caa7de 100644
--- a/tests/apps/ruby/Gemfile.lock
+++ b/tests/apps/ruby/Gemfile.lock
@@ -6,13 +6,13 @@ GEM
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     rack (2.2.4)
-    rack-protection (3.0.3)
+    rack-protection (3.0.4)
       rack
     ruby2_keywords (0.0.5)
-    sinatra (3.0.3)
+    sinatra (3.0.4)
       mustermann (~> 3.0)
       rack (~> 2.2, >= 2.2.4)
-      rack-protection (= 3.0.3)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
     thin (1.8.1)
       daemons (~> 1.0, >= 1.0.9)
@@ -24,5 +24,5 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  sinatra (~> 3.0.3)
+  sinatra (~> 3.0.4)
   thin