diff --git a/Gemfile.lock b/Gemfile.lock
index 9c884ad431..af78602a2c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -359,7 +359,7 @@ GEM
     pry-byebug (3.12.0)
       byebug (~> 13.0)
       pry (>= 0.13, < 0.17)
-    psych (5.3.1)
+    psych (5.4.0)
       date
       stringio
     public_suffix (7.0.5)