diff --git a/Gemfile.lock b/Gemfile.lock
index aa13ccb..5f5701b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,7 +18,7 @@ GEM
       concurrent-ruby (~> 1.0)
     method_source (1.0.0)
     parallel (1.21.0)
-    parser (3.1.0.0)
+    parser (3.1.1.0)
       ast (~> 2.4.1)
     pry (0.14.1)
       coderay (~> 1.1)