diff --git a/doc/conf.py b/doc/conf.py
index a0e69e6f..c2ebc772 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -1,12 +1,15 @@
 import os
-from iminuit import __version__ as version
-import sys
 
-sys.path.append(".")
+# release and version are special variables used by sphinx
+from iminuit import __version__ as version
 
-from root_version import root_version  # noqa
+# We set the root_version manually, because it setting it
+# automatically and efficiently in CI is difficult.
+# To update the number:
+# - Make sure you have a full clone, not a shallow clone of ROOT.
+# - Run `doc/root_version.py` and copy the string here.
+root_version = "v6-25-02-9213-g754d22635f"
 
-# release and version are special variables used by sphinx
 
 with open("../README.rst") as f:
     readme_content = f.read()
@@ -49,6 +52,7 @@
 nbsphinx_execute = "auto"
 # use FAST=1 to speed up doc build
 if bool(os.environ.get("FAST", False)):
+    print("Fast generation activated")
     nbsphinx_execute = "never"
 
 autoclass_content = "both"
diff --git a/doc/release.md b/doc/release.md
index 06f1e50b..a0f6f946 100644
--- a/doc/release.md
+++ b/doc/release.md
@@ -1,15 +1,20 @@
-How to make a release
-=====================
+# How to make a release
 
 - Sync local `main` and `develop` with Github
+
   - `for x in main develop; git checkout $x; git pull`
+
 - On `develop` branch
+
   - Update version in `pyproject.toml`
     - For a beta release, add `.betaN`, where N is a number >= 0
     - For a release candidate, add `.rcN`
   - Run `python3 doc/update_changelog.py` or update `doc/changelog.rst` manually
     - Check the output if you used the script
+  - If necessary, update ROOT version in `doc/conf.py`, see instructions there
+
 - Merge `develop` into `main`
+
   - Every push to `main` triggers building wheels, uploading to PyPI, and tagging/publishing on GitHub
   - If there are problems with the wheels, commit fixes to `develop`, then merge again into `main`
   - Note: Upload to PyPI uses API tokens configured in PyPI and Github "Secrets"
diff --git a/doc/root_version.py b/doc/root_version.py
index 5294315d..a9abad93 100644
--- a/doc/root_version.py
+++ b/doc/root_version.py
@@ -25,4 +25,4 @@
     .decode()
     .strip()
 )
-print("ROOT", root_version)
+print(root_version)
diff --git a/pyproject.toml b/pyproject.toml
index 1d8cf39f..1bafda62 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "scikit_build_core.build"
 [project]
 name = "iminuit"
 description = "Jupyter-friendly Python frontend for MINUIT2 in C++"
-version = "2.29.1"
+version = "2.30.0"
 maintainers = [{ name = "Hans Dembinski", email = "hans.dembinski@gmail.com" }]
 readme = "README.rst"
 requires-python = ">=3.9"