diff --git a/Gemfile.lock b/Gemfile.lock
index e378d13..f560f74 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,17 +12,17 @@ GEM
     concurrent-ruby (1.1.8)
     cool.io (1.7.1)
     docile (1.3.5)
-    fluentd (1.12.3)
+    fluentd (1.16.1)
       bundler
       cool.io (>= 1.4.5, < 2.0.0)
-      http_parser.rb (>= 0.5.1, < 0.7.0)
+      http_parser.rb (>= 0.5.1, < 0.9.0)
       msgpack (>= 1.3.1, < 2.0.0)
-      serverengine (>= 2.2.2, < 3.0.0)
+      serverengine (>= 2.3.2, < 3.0.0)
       sigdump (~> 0.2.2)
-      strptime (>= 0.2.2, < 1.0.0)
+      strptime (>= 0.2.4, < 1.0.0)
       tzinfo (>= 1.0, < 3.0)
       tzinfo-data (~> 1.0)
-      webrick (>= 1.4.2, < 1.8.0)
+      webrick (~> 1.4)
       yajl-ruby (~> 1.0)
     http_parser.rb (0.6.0)
     json (2.5.1)
@@ -30,7 +30,7 @@ GEM
     power_assert (2.0.0)
     rake (12.3.3)
     redis (4.2.5)
-    serverengine (2.2.3)
+    serverengine (2.3.2)
       sigdump (~> 0.2.2)
     sigdump (0.2.4)
     simplecov (0.21.2)
@@ -46,8 +46,8 @@ GEM
       concurrent-ruby (~> 1.0)
     tzinfo-data (1.2021.1)
       tzinfo (>= 1.0.0)
-    webrick (1.7.0)
-    yajl-ruby (1.4.1)
+    webrick (1.8.2)
+    yajl-ruby (1.4.3)
 
 PLATFORMS
   ruby