diff --git a/Gemfile.lock b/Gemfile.lock
index e7095b66..65f874a8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -191,10 +191,11 @@ GEM
     js-routes (2.2.5)
       railties (>= 4)
     json (2.6.3)
-    json_schemer (0.2.24)
+    json_schemer (0.2.25)
       ecma-re-validator (~> 0.3)
       hana (~> 1.3)
       regexp_parser (~> 2.0)
+      simpleidn (~> 0.2)
       uri_template (~> 0.7)
     jwt (2.7.0)
     kaminari (1.2.2)
@@ -445,6 +446,8 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    simpleidn (0.2.1)
+      unf (~> 0.1.4)
     slim (5.1.0)
       temple (~> 0.10.0)
       tilt (>= 2.0.6, < 2.2)
@@ -491,6 +494,9 @@ GEM
     turbolinks-source (5.2.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.8.2)
     unicode-display_width (2.4.2)
     uri_template (0.7.0)
     version_gem (1.1.2)