diff --git a/rack/blog/Gemfile.lock b/rack/blog/Gemfile.lock
index 1e92728..7e7ac24 100644
--- a/rack/blog/Gemfile.lock
+++ b/rack/blog/Gemfile.lock
@@ -72,14 +72,14 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.4)
+    concurrent-ruby (1.1.10)
     crass (1.0.5)
     erubi (1.8.0)
     execjs (2.7.0)
     ffi (1.10.0)
-    globalid (0.4.2)
-      activesupport (>= 4.2.0)
-    i18n (1.5.3)
+    globalid (1.0.1)
+      activesupport (>= 5.0)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     io-like (0.3.0)
     jbuilder (2.8.0)
@@ -102,7 +102,7 @@ GEM
       rake
     mini_mime (1.0.1)
     mini_portile2 (2.8.0)
-    minitest (5.11.3)
+    minitest (5.17.0)
     msgpack (1.2.6)
     multi_json (1.13.1)
     nio4r (2.5.8)
@@ -180,7 +180,7 @@ GEM
     turbolinks (5.2.0)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)