diff --git a/Gemfile.lock b/Gemfile.lock
index 951713e..9dd589b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -289,7 +289,7 @@ GEM
       actionpack (>= 5.2)
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
-    stringio (3.0.1)
+    stringio (3.1.0)
     strscan (3.0.1)
     sync (0.5.0)
     temple (0.8.2)