diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6fc13e9..210d608 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+### 4.9.0
+* Upgrade to Ruby 3.3 for docker distribution.
+
 ### 4.8.0
 * Move `BUILDKITE_BUILDER_PIPELINE_PATH` override as part of command abstract.
 
diff --git a/Dockerfile b/Dockerfile
index 46893a2..57857cd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.0
+FROM ruby:3.3
 ARG version
 
 RUN if [ -z ${version} ]; then                        \
diff --git a/VERSION b/VERSION
index 88f1811..6ed7776 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.8.0
+4.9.0