diff --git a/Gemfile.lock b/Gemfile.lock
index f930478..2419e4d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,7 @@ GEM
     minitest (5.21.1)
     mutex_m (0.2.0)
     parallel (1.24.0)
-    parser (3.3.0.3)
+    parser (3.3.0.4)
       ast (~> 2.4.1)
       racc
     public_suffix (5.0.4)