diff --git a/steep/Gemfile.lock b/steep/Gemfile.lock
index 2df930cef..13484e3a3 100644
--- a/steep/Gemfile.lock
+++ b/steep/Gemfile.lock
@@ -34,7 +34,7 @@ GEM
     logger (1.7.0)
     minitest (5.25.5)
     mutex_m (0.3.0)
-    parser (3.3.7.3)
+    parser (3.3.7.4)
       ast (~> 2.4.1)
       racc
     racc (1.8.1)