diff --git a/Gemfile.lock b/Gemfile.lock
index d710d86..4b7c616 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -74,7 +74,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.10)
     erubi (1.6.1)
     execjs (2.7.0)
     faraday (0.12.1)
@@ -82,10 +82,11 @@ GEM
     faraday_middleware (0.11.0.1)
       faraday (>= 0.7.4, < 1.0)
     ffi (1.9.18)
-    globalid (0.4.0)
-      activesupport (>= 4.2.0)
+    globalid (1.0.1)
+      activesupport (>= 5.0)
     htmlentities (4.3.4)
-    i18n (0.8.4)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     ims-lti (2.1.3)
       addressable (~> 2.5, >= 2.5.1)
       builder (~> 3.2)
@@ -124,7 +125,7 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
     mini_portile2 (2.2.0)
-    minitest (5.10.2)
+    minitest (5.17.0)
     multi_json (1.12.1)
     multipart-post (2.0.0)
     nio4r (2.1.0)
@@ -219,7 +220,7 @@ GEM
     turbolinks (5.0.1)
       turbolinks-source (~> 5)
     turbolinks-source (5.0.3)
-    tzinfo (1.2.3)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)