diff --git a/Gemfile.lock b/Gemfile.lock
index aa7ecc7..5e3a731 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -94,7 +94,7 @@ GEM
     mime-types (1.25.1)
     minitest (5.3.5)
     mono_logger (1.1.0)
-    multi_json (1.9.0)
+    multi_json (1.14.1)
     mysql2 (0.3.11)
     net-ldap (0.3.1)
     paperclip (3.4.2)
@@ -113,7 +113,7 @@ GEM
       activerecord (>= 3.0)
       i18n (>= 0.5.0)
       railties (>= 3.0.0)
-    rack (1.4.5)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-protection (1.5.0)
@@ -178,7 +178,7 @@ GEM
       rack-protection (~> 1.4)
       tilt (~> 1.3, >= 1.3.4)
     slop (3.5.0)
-    sprockets (2.2.2)
+    sprockets (2.2.3)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)