diff --git a/CMakeLists.txt b/CMakeLists.txt
index df1295f..31ea72f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -52,6 +52,21 @@ if(MSVC)
     xcheck_add_c_compiler_flag(-Wno-reserved-identifier)
     xcheck_add_c_compiler_flag(-Wdeprecated-declarations)
     xcheck_add_c_compiler_flag(/experimental:c11atomics)
+    xcheck_add_c_compiler_flag(/wd4018) # -Wno-sign-conversion
+    xcheck_add_c_compiler_flag(/wd4061) # -Wno-implicit-fallthrough
+    xcheck_add_c_compiler_flag(/wd4100) # -Wno-unused-parameter
+    xcheck_add_c_compiler_flag(/wd4200) # -Wno-zero-length-array
+    xcheck_add_c_compiler_flag(/wd4242) # -Wno-shorten-64-to-32
+    xcheck_add_c_compiler_flag(/wd4244) # -Wno-shorten-64-to-32
+    xcheck_add_c_compiler_flag(/wd4245) # -Wno-sign-compare
+    xcheck_add_c_compiler_flag(/wd4267) # -Wno-shorten-64-to-32
+    xcheck_add_c_compiler_flag(/wd4388) # -Wno-sign-compare
+    xcheck_add_c_compiler_flag(/wd4389) # -Wno-sign-compare
+    xcheck_add_c_compiler_flag(/wd4710) # Function not inlined
+    xcheck_add_c_compiler_flag(/wd4711) # Function was inlined
+    xcheck_add_c_compiler_flag(/wd4820) # Padding added after construct
+    xcheck_add_c_compiler_flag(/wd4996) # -Wdeprecated-declarations
+    xcheck_add_c_compiler_flag(/wd5045) # Compiler will insert Spectre mitigation for memory load if /Qspectre switch specified
 endif()
 
 # MacOS and GCC 11 or later need -Wno-maybe-uninitialized
diff --git a/cutils.c b/cutils.c
index 396bc71..4d11481 100644
--- a/cutils.c
+++ b/cutils.c
@@ -37,7 +37,9 @@
 #undef NANOSEC
 #define NANOSEC ((uint64_t) 1e9)
 
+#ifdef __GNUC__
 #pragma GCC visibility push(default)
+#endif
 
 void pstrcpy(char *buf, int buf_size, const char *str)
 {
@@ -1404,4 +1406,6 @@ int js_cond_timedwait(js_cond_t *cond, js_mutex_t *mutex, uint64_t timeout) {
 
 #endif /* !defined(EMSCRIPTEN) && !defined(__wasi__) */
 
+#ifdef __GNUC__
 #pragma GCC visibility pop
+#endif
diff --git a/quickjs.c b/quickjs.c
index 64b8bbe..e415b5b 100644
--- a/quickjs.c
+++ b/quickjs.c
@@ -67,6 +67,10 @@
 #define CONFIG_ATOMICS
 #endif
 
+#ifndef __GNUC__
+#define __extension__
+#endif
+
 // Debug trace system: the debug output will be produced to the dump stream (currently
 // stdout) if qjs is invoked with -D<bitmask> with the corresponding bit set.