diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f6c8ec..5fe4cec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- Update Docker base image to golang 1.27.3 so e2e suites declaring `go 1.27.3` can run (`GOTOOLCHAIN=local` in the image).
+
 ## [5.4.2] - 2026-10-25
 
 ### Changed
diff --git a/Dockerfile b/Dockerfile
index c3ae749..e0a88a8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.27.2
+FROM golang:1.27.3
 
 RUN apt-get update \
   && apt-get install --no-install-recommends --no-install-suggests -y ca-certificates jq yq \