diff --git a/Gemfile.lock b/Gemfile.lock
index c9e1550..3d262e4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -194,7 +194,7 @@ GEM
       method_source (~> 0.9.0)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
-    public_suffix (3.1.0)
+    public_suffix (3.1.1)
     puma (4.0.0)
       nio4r (~> 2.0)
     rack (2.0.7)