diff --git a/api/ruby/rendering-data-as-graphs/Gemfile.lock b/api/ruby/rendering-data-as-graphs/Gemfile.lock
index dc2bd195e..0b40d61f2 100644
--- a/api/ruby/rendering-data-as-graphs/Gemfile.lock
+++ b/api/ruby/rendering-data-as-graphs/Gemfile.lock
@@ -1,7 +1,8 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    addressable (2.3.3)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     faraday (0.8.6)
       multipart-post (~> 1.1)
     faraday_middleware (0.9.0)
@@ -18,6 +19,7 @@ GEM
       hashie (~> 1.2)
       multi_json (~> 1.3)
       netrc (~> 0.7.7)
+    public_suffix (4.0.6)
     rack (1.5.2)
     rack-protection (1.4.0)
       rack