diff --git a/test/apps/rails5.2/Gemfile.lock b/test/apps/rails5.2/Gemfile.lock
index 087073bbd3..a0680cdfb6 100644
--- a/test/apps/rails5.2/Gemfile.lock
+++ b/test/apps/rails5.2/Gemfile.lock
@@ -41,8 +41,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     archive-zip (0.7.0)
       io-like (~> 0.3.0)
     arel (9.0.0)
@@ -101,7 +101,7 @@ GEM
     nio4r (2.1.0)
     nokogiri (1.8.1)
       mini_portile2 (~> 2.3.0)
-    public_suffix (3.0.1)
+    public_suffix (4.0.7)
     puma (3.11.0)
     rack (2.0.3)
     rack-test (0.8.2)