diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 22f4d3c..082b5c6 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -21,7 +21,7 @@ permissions:
 
 jobs:
   release-s7commctl-binary:
-    uses: otfabric/.github/.github/workflows/go-binary-release.yml@v3.3.0
+    uses: otfabric/.github/.github/workflows/go-binary-release.yml@v3.6.0
     with:
       bump: ${{ inputs.bump }}
       binary-name: s7commctl
diff --git a/RELEASE.md b/RELEASE.md
index 879248a..c2556ad 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -1,5 +1,21 @@
 # s7commctl Releases
 
+## v0.6.1
+
+**Date:** 2026-11-08
+**Previous release:** v0.6.0
+
+### Summary
+
+Built on go-cotp v1.3.0, and release binaries are built with the latest Go 1.26 patch release.
+
+### Changed
+
+- Built on go-cotp v1.3.0 (was v1.2.0; an indirect dependency through go-s7comm). The COTP client no longer fails the handshake when the connection confirm's responding transport selector (0xC2) differs from the configured remote selector; X.224 §13.3.4 allows it to differ, and it is kept as the negotiated remote selector. go-cotp also adds the server option `ServerConfig.EchoSelectors`, off by default. `version` lists `go-cotp 1.3.0`.
+- `go.mod` declares `go 1.26.0` (was `go 1.26`), as the other OT Fabric repositories do; the minimum Go version is unchanged. Release binaries are built with the latest Go 1.26 patch release (otfabric/.github release workflow v3.6.0); with this `go` line the earlier workflow would have built with exactly go1.26.0.
+
+---
+
 ## v0.6.0
 
 **Date:** 2026-11-07
diff --git a/go.mod b/go.mod
index acdbc05..5b1b0c3 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/otfabric/s7commctl
 
-go 1.26
+go 1.26.0
 
 require (
 	github.com/otfabric/go-s7comm v0.12.0
@@ -10,6 +10,6 @@ require (
 
 require (
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/otfabric/go-cotp v1.2.0 // indirect
+	github.com/otfabric/go-cotp v1.3.0 // indirect
 	github.com/otfabric/go-tpkt v1.1.0 // indirect
 )
diff --git a/go.sum b/go.sum
index 5746ffe..83e22a3 100644
--- a/go.sum
+++ b/go.sum
@@ -1,8 +1,8 @@
 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-cotp v1.2.0 h1:n9YnaUg2TL/7Ciwx1gOZzJTfwETjzKrNc6DtufY/V7k=
-github.com/otfabric/go-cotp v1.2.0/go.mod h1:0XVoeSHnOPj8XWI484tUC2U6dbaKCtVk0z18MipM37s=
+github.com/otfabric/go-cotp v1.3.0 h1:IXfqzdt86GPg6+il9g2GIWLFFmtNuVBMiE2ceLrXJpo=
+github.com/otfabric/go-cotp v1.3.0/go.mod h1:0XVoeSHnOPj8XWI484tUC2U6dbaKCtVk0z18MipM37s=
 github.com/otfabric/go-s7comm v0.12.0 h1:x7a1eUuOduIPzjujxwQTMfGU3OAbFvVHXMmXtQcC7Ss=
 github.com/otfabric/go-s7comm v0.12.0/go.mod h1:td4Iz+J3NNMVk8xeuls+J5Mnya2tBr+7Qeymi447oyg=
 github.com/otfabric/go-tpkt v1.1.0 h1:KTCQePVqqnvDB0A3O4ReRqfa5jJ3jnsEYNUdS91vD4o=