diff --git a/python/src/CMakeLists.txt b/python/src/CMakeLists.txt
index 9bd1744..79cca50 100644
--- a/python/src/CMakeLists.txt
+++ b/python/src/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.4...3.18)
 project(pyfprops LANGUAGES CXX)
 
-find_package(pybind11 REQUIRED)
+find_package(pybind11 2.9 REQUIRED)
 
 pybind11_add_module(${PROJECT_NAME} fprops.cpp)