diff --git a/Gemfile.lock b/Gemfile.lock
index e3ed64e..86938f8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -17,7 +17,7 @@ GEM
       tins (~> 1.6)
     diff-lcs (1.3)
     docile (1.3.1)
-    json (2.2.0)
+    json (2.3.1)
     method_source (0.9.2)
     pry (0.12.2)
       coderay (~> 1.1.0)