diff --git a/spirv-tools/CMakeLists.txt b/spirv-tools/CMakeLists.txt
index 214ff91..a9de5a1 100644
--- a/spirv-tools/CMakeLists.txt
+++ b/spirv-tools/CMakeLists.txt
@@ -135,7 +135,7 @@ if(NOT COMMAND find_host_program)
   endmacro()
 endif()
 
-find_host_package(PythonInterp)
+find_package(PythonInterp 3 REQUIRED)
 
 
 # Defaults to OFF if the user didn't set it.