diff --git a/docker/estenrye/fluentd-cloudtrail/Gemfile b/docker/estenrye/fluentd-cloudtrail/Gemfile
index 4fbb696c..611c223c 100644
--- a/docker/estenrye/fluentd-cloudtrail/Gemfile
+++ b/docker/estenrye/fluentd-cloudtrail/Gemfile
@@ -12,7 +12,7 @@ gem "async-http", "= 0.59.2"
 
 gem "ext_monitor", "= 0.1.2"
 
-gem "fluentd", "= 1.14.6"
+gem "fluentd", "= 1.16.4"
 
 gem "bigdecimal", "= 3.1.2"
 
diff --git a/docker/estenrye/fluentd-cloudtrail/Gemfile.lock b/docker/estenrye/fluentd-cloudtrail/Gemfile.lock
index b8e4f387..6f682380 100644
--- a/docker/estenrye/fluentd-cloudtrail/Gemfile.lock
+++ b/docker/estenrye/fluentd-cloudtrail/Gemfile.lock
@@ -37,10 +37,10 @@ GEM
     aws-sigv4 (1.5.1)
       aws-eventstream (~> 1, >= 1.0.2)
     bigdecimal (3.1.2)
-    concurrent-ruby (1.1.10)
+    concurrent-ruby (1.2.3)
     console (1.15.3)
       fiber-local
-    cool.io (1.7.1)
+    cool.io (1.8.0)
     elasticsearch (7.17.1)
       elasticsearch-api (= 7.17.1)
       elasticsearch-transport (= 7.17.1)
@@ -93,22 +93,22 @@ GEM
       aws-sdk-s3 (~> 1.60)
       aws-sdk-sqs (~> 1.23)
       fluentd (>= 0.14.22, < 2)
-    fluentd (1.14.6)
+    fluentd (1.16.4)
       bundler
       cool.io (>= 1.4.5, < 2.0.0)
       http_parser.rb (>= 0.5.1, < 0.9.0)
       msgpack (>= 1.3.1, < 2.0.0)
-      serverengine (>= 2.2.5, < 3.0.0)
-      sigdump (~> 0.2.2)
+      serverengine (>= 2.3.2, < 3.0.0)
+      sigdump (~> 0.2.5)
       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 (0.8.0)
     jmespath (1.6.1)
     json (2.6.2)
-    msgpack (1.5.6)
+    msgpack (1.7.2)
     multi_json (1.15.0)
     multipart-post (2.2.3)
     nio4r (2.5.8)
@@ -121,18 +121,18 @@ GEM
       protocol-hpack (~> 1.4)
       protocol-http (~> 0.18)
     ruby2_keywords (0.0.5)
-    serverengine (2.3.0)
+    serverengine (2.3.2)
       sigdump (~> 0.2.2)
-    sigdump (0.2.4)
+    sigdump (0.2.5)
     strptime (0.2.5)
     timers (4.3.4)
     traces (0.7.0)
-    tzinfo (2.0.5)
+    tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    tzinfo-data (1.2022.4)
+    tzinfo-data (1.2024.1)
       tzinfo (>= 1.0.0)
     uuidtools (2.2.0)
-    webrick (1.7.0)
+    webrick (1.8.1)
     yajl-ruby (1.4.3)
 
 PLATFORMS
@@ -147,7 +147,7 @@ DEPENDENCIES
   fluent-plugin-elasticsearch (= 5.2.4)
   fluent-plugin-record_splitter (= 0.2.1)
   fluent-plugin-s3 (= 1.7.1)
-  fluentd (= 1.14.6)
+  fluentd (= 1.16.4)
   json (= 2.6.2)
   oj (= 3.13.11)