diff --git a/Gemfile.lock b/Gemfile.lock
index bb94d19..6cdf594 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,7 +18,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
-    syntax_tree (4.0.2)
+    syntax_tree (4.2.0)
       prettier_print (>= 1.0.2)
 
 PLATFORMS