diff --git a/Gemfile.lock b/Gemfile.lock
index 90c5152..28a694f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -23,7 +23,7 @@ GEM
     rake-compiler (1.3.1)
       rake
     rake-compiler-dock (1.12.0)
-    rb_sys (0.9.127)
+    rb_sys (0.9.128)
       rake-compiler-dock (= 1.12.0)
     regexp_parser (2.11.3)
     rspec (3.13.2)