diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1d158843de..843ff2bf0b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@
 # See accompanying file Copyright.txt for details.
 #
 if("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}")
-  cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
+  cmake_minimum_required(VERSION 3.13..4.0 FATAL_ERROR)
   set(kwiml_standalone 1)
   project(KWIML)
   include(CTest)
diff --git a/include/kwiml/abi.h b/include/kwiml/abi.h
index cefe9ce2c2..9b2358099a 100644
--- a/include/kwiml/abi.h
+++ b/include/kwiml/abi.h
@@ -481,6 +481,10 @@ suppression macro KWIML_ABI_NO_VERIFY was defined.
 #elif defined(__riscv) || defined(__riscv__)
 # define KWIML_ABI_ENDIAN_ID KWIML_ABI_ENDIAN_ID_LITTLE
 
+/* Sunway */
+#elif defined(__sw_64) || defined(__sw_64__)
+# define KWIML_ABI_ENDIAN_ID KWIML_ABI_ENDIAN_ID_LITTLE
+
 /* Unknown CPU */
 #elif !defined(KWIML_ABI_NO_ERROR_ENDIAN)
 # error "Byte order of target CPU unknown."