diff --git a/doc/source/changelog.rst b/doc/source/changelog.rst
index 5b3473017..f4afb3e3a 100644
--- a/doc/source/changelog.rst
+++ b/doc/source/changelog.rst
@@ -15,7 +15,7 @@ organisation on `GitHub <https://github.com/openbiosim/sire>`__.
 `2024.1.0 <https://github.com/openbiosim/sire/compare/2023.5.0...2024.1.0>`__ - March 2024
 ------------------------------------------------------------------------------------------
 
-* Please add an item to this changelog when you create your PR
+* Specified python < 3.12 in the requirements files.
 
 `2023.5.1 <https://github.com/openbiosim/sire/compare/2023.5.0...2023.5.1>`__ - January 2024
 --------------------------------------------------------------------------------------------
diff --git a/requirements_build.txt b/requirements_build.txt
index c2b7173ea..7d09a6677 100644
--- a/requirements_build.txt
+++ b/requirements_build.txt
@@ -2,7 +2,7 @@
 
 cmake
 git
-python
+python <3.12
 
 make ; sys_platform == "darwin"
 libtool ; sys_platform == "darwin"
diff --git a/requirements_host.txt b/requirements_host.txt
index 13cd912df..47d10fc67 100644
--- a/requirements_host.txt
+++ b/requirements_host.txt
@@ -7,7 +7,7 @@ libcblas
 libnetcdf
 openmm
 pandas
-python
+python<3.12
 qt-main
 rich
 tbb