diff --git a/geode-book/Gemfile.lock b/geode-book/Gemfile.lock
index bd97f98fc1b9..cb9e0ab8468a 100644
--- a/geode-book/Gemfile.lock
+++ b/geode-book/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     ansi (1.5.0)
     backports (3.21.0)
     bookbindery (10.1.18)
@@ -178,7 +178,7 @@ GEM
     padrino-support (0.13.3.4)
       activesupport (>= 3.1)
     parallel (1.20.1)
-    public_suffix (4.0.6)
+    public_suffix (5.0.0)
     puma (5.3.2)
       nio4r (~> 2.0)
     rack (1.6.13)