diff --git a/newrelic_mpstat_agent/Gemfile.lock b/newrelic_mpstat_agent/Gemfile.lock
index 3db2cd5..a1010b8 100644
--- a/newrelic_mpstat_agent/Gemfile.lock
+++ b/newrelic_mpstat_agent/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     faraday (0.8.7)
       multipart-post (~> 1.1)
-    json (1.8.0)
+    json (2.6.3)
     multipart-post (1.2.0)
     newrelic_plugin (1.0.2)
       faraday (>= 0.8.1)