diff --git a/Gemfile b/Gemfile
index 16c21a6..f51aa9f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,5 +24,5 @@ group :test do
   gem "rubocop-rspec"
 
   # Fix OpenSSL 3.x CRL verification issues
-  gem "openssl", "3.3.2"
+  gem "openssl", "4.0.0"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index aff8b05..cdf51bb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -48,7 +48,7 @@ GEM
     logger (1.7.0)
     mini_portile2 (2.8.9)
     minitest (5.27.0)
-    openssl (3.3.2)
+    openssl (4.0.0)
     parallel (1.27.0)
     parser (3.3.10.0)
       ast (~> 2.4.1)
@@ -129,7 +129,7 @@ DEPENDENCIES
   activerecord (< 8)
   connection_pool (< 3)
   database_cleaner-active_record
-  openssl (= 3.3.2)
+  openssl (= 4.0.0)
   operandi!
   rake
   rspec