diff --git a/ruby-sdk/Gemfile b/ruby-sdk/Gemfile
index 87778260..3251c026 100644
--- a/ruby-sdk/Gemfile
+++ b/ruby-sdk/Gemfile
@@ -12,6 +12,6 @@ end
 group :development do
   gem "rake", "~> 13.3"
   gem "rake-compiler"
-  gem "rb_sys", "~> 0.9.124"
+  gem "rb_sys", "~> 0.9.126"
   gem "rubocop", "~> 1.82"
 end
diff --git a/ruby-sdk/Gemfile.lock b/ruby-sdk/Gemfile.lock
index 895883ee..e9d52fcc 100644
--- a/ruby-sdk/Gemfile.lock
+++ b/ruby-sdk/Gemfile.lock
@@ -25,7 +25,8 @@ GEM
     rake-compiler (1.3.1)
       rake
     rake-compiler-dock (1.11.0)
-    rb_sys (0.9.124)
+    rb_sys (0.9.126)
+      json (>= 2)
       rake-compiler-dock (= 1.11.0)
     regexp_parser (2.11.3)
     rspec (3.13.2)
@@ -67,7 +68,7 @@ DEPENDENCIES
   eppo-server-sdk!
   rake (~> 13.3)
   rake-compiler
-  rb_sys (~> 0.9.124)
+  rb_sys (~> 0.9.126)
   rspec (~> 3.13)
   rubocop (~> 1.82)