diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 0129d96..234477e 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -21,7 +21,7 @@ permissions:
 
 jobs:
   release-ocppctl-binary:
-    uses: otfabric/.github/.github/workflows/go-binary-release.yml@v3.3.1
+    uses: otfabric/.github/.github/workflows/go-binary-release.yml@v3.6.0
     with:
       bump: ${{ inputs.bump }}
       binary-name: ocppctl
diff --git a/RELEASE.md b/RELEASE.md
index c468fc9..88e3f5e 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -1,5 +1,21 @@
 # ocppctl Releases
 
+## v0.4.1
+
+**Date:** 2026-11-08
+**Previous release:** v0.4.0
+
+### Summary
+
+Built on go-ocpp v0.3.3, and release binaries are built with the latest Go 1.26 patch release.
+
+### Changed
+
+- Built on go-ocpp v0.3.3 (was v0.2.0). v0.3.0 adds `ocpp.ConnInfo.Compression` and `server.Session.Compression()` (whether the WebSocket handshake negotiated permessage-deflate), additive and not used by ocppctl; v0.3.1 to v0.3.3 have no library code changes and qualify go-ocpp against ocpp-interop v0.6.2, v0.7.0 and v0.10.0. ocppctl behaves as before. `version` lists `go-ocpp 0.3.3`.
+- Release binaries are built with the latest Go 1.26 patch release (otfabric/.github release workflow v3.6.0); they were built with the exact Go version in `go.mod` (1.26.0).
+
+---
+
 ## v0.4.0
 
 **Date:** 2026-11-07
diff --git a/docs/KNOWN_ISSUES.md b/docs/KNOWN_ISSUES.md
index 49ceaee..7d42f49 100644
--- a/docs/KNOWN_ISSUES.md
+++ b/docs/KNOWN_ISSUES.md
@@ -14,7 +14,7 @@ entry is resolved, it moves to the release notes of the release that resolves it
 ocppctl is built on [go-ocpp](https://github.com/otfabric/go-ocpp). These are defects of
 that library, found while building and testing ocppctl. All three are fixed (G1 and G2
 in go-ocpp v0.1.2, G3 in v0.1.3), and ocppctl has had no workaround of its own since
-v0.1.1. ocppctl now requires go-ocpp v0.2.0.
+v0.1.1. ocppctl now requires go-ocpp v0.3.3.
 
 | # | Bug | Effect on ocppctl | Status |
 |---|-----|-------------------|--------|
diff --git a/go.mod b/go.mod
index 50acf5c..dfd68cc 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/otfabric/ocppctl
 go 1.26.0
 
 require (
-	github.com/otfabric/go-ocpp v0.2.0
+	github.com/otfabric/go-ocpp v0.3.3
 	github.com/spf13/cobra v1.10.2
 	github.com/spf13/pflag v1.0.9
 	gopkg.in/yaml.v3 v3.0.1
diff --git a/go.sum b/go.sum
index dd7ee50..1d9f51a 100644
--- a/go.sum
+++ b/go.sum
@@ -3,8 +3,8 @@ github.com/coder/websocket v1.8.15/go.mod h1:NX3SzP+inril6yawo5CQXx8+fk145lPDC6p
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
-github.com/otfabric/go-ocpp v0.2.0 h1:4OVv7k/8tU1yC/jXddhnUDH1bpW07hQrTVOqBP30ea0=
-github.com/otfabric/go-ocpp v0.2.0/go.mod h1:ZtCbEeGYIqClASH7HEQdjUgRpljs9tF02WG7uTiBFws=
+github.com/otfabric/go-ocpp v0.3.3 h1:y1uC0GATTbAS59fCuP8lGJjQq7Wqo6fQiY0jKgqMSmo=
+github.com/otfabric/go-ocpp v0.3.3/go.mod h1:ZtCbEeGYIqClASH7HEQdjUgRpljs9tF02WG7uTiBFws=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/santhosh-tekuri/jsonschema/v6 v6.0.2 h1:KRzFb2m7YtdldCEkzs6KqmJw4nqEVZGK7IN2kJkjTuQ=
 github.com/santhosh-tekuri/jsonschema/v6 v6.0.2/go.mod h1:JXeL+ps8p7/KNMjDQk3TCwPpBy0wYklyWTfbkIzdIFU=