diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3fc9cff..b2423fe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -88,6 +88,7 @@ if(APPLE)
     CMAKE_CXX_FLAGS
     "${CMAKE_CXX_FLAGS} -Wno-inconsistent-missing-override -Wno-unused-command-line-argument -Wno-unused-result -Wno-exceptions"
     )
+  add_compile_options(-O1)
   set(CMAKE_OSX_DEPLOYMENT_TARGET "10.15" CACHE STRING "Minimum OS X deployment version")
 endif()