diff --git a/evaluationserver/Gemfile.lock b/evaluationserver/Gemfile.lock
index d555d8371..2b74fc001 100644
--- a/evaluationserver/Gemfile.lock
+++ b/evaluationserver/Gemfile.lock
@@ -109,7 +109,7 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (2.2.0)
+    json (2.3.1)
     launchy (2.4.3)
       addressable (~> 2.3)
     less (2.6.0)