diff --git a/Gemfile.lock b/Gemfile.lock
index 78c20b56e4b..1fb35eb2ceb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -548,7 +548,7 @@ GEM
     sqlite3 (2.2.0-x86_64-linux-gnu)
     sshkey (3.0.0)
     stackprof (0.2.26)
-    stringio (3.1.1)
+    stringio (3.1.2)
     syntax_tree (6.2.0)
       prettier_print (>= 1.2.0)
     syntax_tree-disable_ternary (1.0.0)