diff --git a/docker/estenrye/fluentd-cloudtrail/Gemfile b/docker/estenrye/fluentd-cloudtrail/Gemfile
index 4fbb696c..5d4877e8 100644
--- a/docker/estenrye/fluentd-cloudtrail/Gemfile
+++ b/docker/estenrye/fluentd-cloudtrail/Gemfile
@@ -14,7 +14,7 @@ gem "ext_monitor", "= 0.1.2"
 
 gem "fluentd", "= 1.14.6"
 
-gem "bigdecimal", "= 3.1.2"
+gem "bigdecimal", "= 3.3.1"
 
 gem "fluent-plugin-s3", "= 1.7.1"
 
diff --git a/docker/estenrye/fluentd-cloudtrail/Gemfile.lock b/docker/estenrye/fluentd-cloudtrail/Gemfile.lock
index b8e4f387..898efaa2 100644
--- a/docker/estenrye/fluentd-cloudtrail/Gemfile.lock
+++ b/docker/estenrye/fluentd-cloudtrail/Gemfile.lock
@@ -36,7 +36,7 @@ GEM
       aws-sigv4 (~> 1.1)
     aws-sigv4 (1.5.1)
       aws-eventstream (~> 1, >= 1.0.2)
-    bigdecimal (3.1.2)
+    bigdecimal (3.3.1)
     concurrent-ruby (1.1.10)
     console (1.15.3)
       fiber-local
@@ -141,7 +141,7 @@ PLATFORMS
 
 DEPENDENCIES
   async-http (= 0.59.2)
-  bigdecimal (= 3.1.2)
+  bigdecimal (= 3.3.1)
   elasticsearch (= 7.17.1)
   ext_monitor (= 0.1.2)
   fluent-plugin-elasticsearch (= 5.2.4)