diff --git a/infra/concourse/build/data/Gemfile.lock b/infra/concourse/build/data/Gemfile.lock
index 0d858217da2..1a91511e50b 100644
--- a/infra/concourse/build/data/Gemfile.lock
+++ b/infra/concourse/build/data/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     aws-eventstream (1.0.3)
     aws-sdk (2.11.283)
       aws-sdk-resources (= 2.11.283)
@@ -187,7 +187,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.1.0)
+    public_suffix (4.0.6)
     recursive-open-struct (1.1.0)
     representable (3.0.4)
       declarative (< 0.1.0)