diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9081722..4e3f907 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,7 @@ if(DEFINED ENV{VCPKG_ROOT} AND NOT DEFINED CMAKE_TOOLCHAIN_FILE)
   set(CMAKE_TOOLCHAIN_FILE "$ENV{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake"
     CACHE STRING "")
 endif(DEFINED ENV{VCPKG_ROOT} AND NOT DEFINED CMAKE_TOOLCHAIN_FILE)
+set(BUILTIN_SOCKET ON CACHE BOOL "") # for static Python
 
 # configure basic project information
 project(osslsigncode