diff --git a/CMakeLists.txt b/CMakeLists.txt
index b3142e4..906fa04 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -85,9 +85,12 @@
     if (USE_WERROR)
         add_compile_options(/WX)
     endif ()
+    # C4018: signed/unsigned mismatch
+    # C4244: conversion from 'type1' to 'type2', possible loss of data
+    # C4267: conversion from 'size_t' to 'type', possible loss of data
     add_compile_options(
         /MP
-        /W2
+        /W3 /wd4018 /wd4267 /wd4244
         /sdl
         /Qspectre
         /guard:cf