diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8713ba00a..c65a8f171 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,7 +20,8 @@ The release run heads these entries with the version and opens a fresh
   competing pointers until the active stroke ends.
 
 - The declared CMake minimum is now 3.20, the first version that recognizes
-  the build's existing C++23 requirement.
+  the build's existing C++23 requirement. Python wheel builds select this
+  minimum too.
 
 - PDF image dimensions and sample parameters are checked before narrowing; an
   image with an invalid one is skipped. Inline images allocate only as data is
diff --git a/pyproject.toml b/pyproject.toml
index 9ef79b56e..9de792e1b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ tracker = "https://github.com/opendocument-app/OpenDocument.core/issues"
 provider = "scikit_build_core.metadata.setuptools_scm"
 
 [tool.scikit-build]
-cmake.version = ">=3.18"
+cmake.version = ">=3.20"
 # Everything that goes into the wheel is installed by CMake (component
 # `python`, see python/CMakeLists.txt).
 wheel.packages = []