diff --git a/Gemfile.lock b/Gemfile.lock
index 08ccdca..dc424c3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,7 +16,7 @@ GEM
     minitest (5.21.1)
     mqtt (0.6.0)
     parallel (1.24.0)
-    parser (3.3.0.2)
+    parser (3.3.0.3)
       ast (~> 2.4.1)
       racc
     public_suffix (5.0.4)