diff --git a/Gemfile.lock b/Gemfile.lock
index 10f63b9..0e91b56 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -342,7 +342,7 @@ GEM
     spring (4.2.1)
     spring-commands-rspec (1.0.4)
       spring (>= 0.9.1)
-    stringio (3.1.1)
+    stringio (3.1.2)
     thor (1.3.2)
     tilt (2.4.0)
     timeout (0.4.1)