replace PY_SIZE_MAX with SIZE_MAX
diff --git a/Python/asdl.c b/Python/asdl.c
index df387b2..c211078 100644
--- a/Python/asdl.c
+++ b/Python/asdl.c
@@ -9,14 +9,14 @@
 
     /* check size is sane */
     if (size < 0 ||
-        (size && (((size_t)size - 1) > (PY_SIZE_MAX / sizeof(void *))))) {
+        (size && (((size_t)size - 1) > (SIZE_MAX / sizeof(void *))))) {
         PyErr_NoMemory();
         return NULL;
     }
     n = (size ? (sizeof(void *) * (size - 1)) : 0);
 
     /* check if size can be added safely */
-    if (n > PY_SIZE_MAX - sizeof(asdl_seq)) {
+    if (n > SIZE_MAX - sizeof(asdl_seq)) {
         PyErr_NoMemory();
         return NULL;
     }
@@ -40,14 +40,14 @@
 
     /* check size is sane */
     if (size < 0 ||
-        (size && (((size_t)size - 1) > (PY_SIZE_MAX / sizeof(void *))))) {
+        (size && (((size_t)size - 1) > (SIZE_MAX / sizeof(void *))))) {
             PyErr_NoMemory();
             return NULL;
     }
     n = (size ? (sizeof(void *) * (size - 1)) : 0);
 
     /* check if size can be added safely */
-    if (n > PY_SIZE_MAX - sizeof(asdl_seq)) {
+    if (n > SIZE_MAX - sizeof(asdl_seq)) {
         PyErr_NoMemory();
         return NULL;
     }
diff --git a/Python/ast.c b/Python/ast.c
index 0f9c193..c5f363b 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -3985,7 +3985,7 @@
     const char *end;
 
     /* check for integer overflow */
-    if (len > PY_SIZE_MAX / 6)
+    if (len > SIZE_MAX / 6)
         return NULL;
     /* "ä" (2 bytes) may become "\U000000E4" (10 bytes), or 1:5
        "\ä" (3 bytes) may become "\u005c\U000000E4" (16 bytes), or ~1:6 */
diff --git a/Python/compile.c b/Python/compile.c
index 6fe5d5f..45e4262 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -804,7 +804,7 @@
         oldsize = b->b_ialloc * sizeof(struct instr);
         newsize = oldsize << 1;
 
-        if (oldsize > (PY_SIZE_MAX >> 1)) {
+        if (oldsize > (SIZE_MAX >> 1)) {
             PyErr_NoMemory();
             return -1;
         }
@@ -4520,7 +4520,7 @@
     a->a_lnotab = PyBytes_FromStringAndSize(NULL, DEFAULT_LNOTAB_SIZE);
     if (!a->a_lnotab)
         return 0;
-    if ((size_t)nblocks > PY_SIZE_MAX / sizeof(basicblock *)) {
+    if ((size_t)nblocks > SIZE_MAX / sizeof(basicblock *)) {
         PyErr_NoMemory();
         return 0;
     }