diff --git a/Gemfile.lock b/Gemfile.lock
index 4237e23..07ba5d8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -58,7 +58,6 @@ GEM
     hashdiff (0.3.0)
     i18n (0.7.0)
     jmespath (1.1.3)
-    json (1.8.3)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
     mail (2.6.3)
@@ -72,8 +71,7 @@ GEM
       mini_portile2 (~> 2.0.0.rc2)
     pg (0.18.4)
     puma (3.2.0)
-    rack (2.0.0.alpha)
-      json
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.0.beta3)