diff --git a/Gemfile.lock b/Gemfile.lock
index e2b5aab..6c1aa60 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -141,7 +141,7 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (2.3.0)
+    json (2.5.1)
     jsonapi-renderer (0.2.0)
     jwt (1.5.6)
     launchy (2.4.3)
@@ -191,7 +191,7 @@ GEM
       capybara (~> 2.1)
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)
-    postmark (1.21.1)
+    postmark (1.21.3)
       json
     postmark-rails (0.20.0)
       actionmailer (>= 3.0.0)