diff --git a/brooklyn-dist/release/pull-request-reports/Gemfile.lock b/brooklyn-dist/release/pull-request-reports/Gemfile.lock
index 859202ab80..8050aa5f14 100644
--- a/brooklyn-dist/release/pull-request-reports/Gemfile.lock
+++ b/brooklyn-dist/release/pull-request-reports/Gemfile.lock
@@ -1,7 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.3.8)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     faraday (0.9.1)
@@ -28,6 +29,7 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (~> 1.2)
+    public_suffix (5.0.0)
     rack (1.6.4)
     thread_safe (0.3.5)