diff --git a/Gemfile.lock b/Gemfile.lock
index 44970d38b6..2878973cca 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,8 +7,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     afm (0.2.2)
     algolia_html_extractor (2.6.2)
       json (~> 2.0)
@@ -148,7 +148,7 @@ GEM
       pdf-reader (~> 2.0)
       prawn (~> 2.2)
     progressbar (1.10.1)
-    public_suffix (3.1.1)
+    public_suffix (4.0.6)
     pygments.rb (1.1.2)
       multi_json (>= 1.0.0)
     rack (2.1.4)