From 6c9110564b5b7ced8c9d18922b2e5f4daeb69fc5 Mon Sep 17 00:00:00 2001
From: "B. Bergeron" <me@bbergeron.xyz>
Date: Sat, 10 Jan 2026 16:58:21 -0500
Subject: [PATCH] Pin base image version to 3.12.12-trixie + document version
 choice

---
 Dockerfile | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 6dd61a2bd..660d82f75 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,8 +2,14 @@
 # acceleration, file ownership synchronization, custom nodes, and custom node
 # managers.
 
-# Use the recommended Python version 3.12, as specified in the README.
-FROM python:3.12.11-bookworm
+# While Python 3.13 is well supported by ComfyUI, some older custom node packs
+# may not work correctly with this version, which is why we're staying on Python
+# 3.12 for now.
+#
+# Users are free to try different base Python image tags (e.g., 3.13, alpine,
+# *-slim), but for maintainability, only one base version is officially
+# supported at a time.
+FROM python:3.12.12-trixie
 
 # Install cmake, which is an indirect installation dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends cmake