diff --git a/doc/environment_template.yml b/doc/environment_template.yml
index ca132a6b9ef..0f6c8264c04 100644
--- a/doc/environment_template.yml
+++ b/doc/environment_template.yml
@@ -1,6 +1,6 @@
 name: xeus-python-kernel
 channels:
-  - https://prefix.dev/emscripten-forge-dev
+  - https://prefix.dev/emscripten-forge-4x
   - https://prefix.dev/conda-forge
 dependencies:
   - xeus-python