diff --git a/Gemfile.lock b/Gemfile.lock
index 1aefdba..e2345d0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
   specs:
     exifr (1.1.3)
     i18n (0.6.1)
-    json (1.7.5)
+    json (2.5.1)
     mail (2.4.4)
       i18n (>= 0.4.0)
       mime-types (~> 1.16)
@@ -26,8 +26,7 @@ GEM
     nokogiri (1.5.5)
     polyglot (0.3.3)
     rake (10.0.1)
-    rdoc (3.12)
-      json (~> 1.4)
+    rdoc (6.3.2)
     simplecov (0.7.1)
       multi_json (~> 1.0)
       simplecov-html (~> 0.7.1)