diff --git a/src/_avif.c b/src/_avif.c
index 7e7bee703..3585297fe 100644
--- a/src/_avif.c
+++ b/src/_avif.c
@@ -881,26 +881,22 @@ setup_module(PyObject *m) {
     return 0;
 }
 
+static PyModuleDef_Slot slots[] = {
+    {Py_mod_exec, setup_module},
+#ifdef Py_GIL_DISABLED
+    {Py_mod_gil, Py_MOD_GIL_NOT_USED},
+#endif
+    {0, NULL}
+};
+
 PyMODINIT_FUNC
 PyInit__avif(void) {
-    PyObject *m;
-
     static PyModuleDef module_def = {
         PyModuleDef_HEAD_INIT,
         .m_name = "_avif",
-        .m_size = -1,
         .m_methods = avifMethods,
+        .m_slots = slots
     };
 
-    m = PyModule_Create(&module_def);
-    if (setup_module(m) < 0) {
-        Py_DECREF(m);
-        return NULL;
-    }
-
-#ifdef Py_GIL_DISABLED
-    PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
-#endif
-
-    return m;
+    return PyModuleDef_Init(&module_def);
 }
diff --git a/src/_imaging.c b/src/_imaging.c
index 72f122143..0c93a96bc 100644
--- a/src/_imaging.c
+++ b/src/_imaging.c
@@ -4460,27 +4460,22 @@ setup_module(PyObject *m) {
     return 0;
 }
 
+static PyModuleDef_Slot slots[] = {
+    {Py_mod_exec, setup_module},
+#ifdef Py_GIL_DISABLED
+    {Py_mod_gil, Py_MOD_GIL_NOT_USED},
+#endif
+    {0, NULL}
+};
+
 PyMODINIT_FUNC
 PyInit__imaging(void) {
-    PyObject *m;
-
     static PyModuleDef module_def = {
         PyModuleDef_HEAD_INIT,
         .m_name = "_imaging",
-        .m_size = -1,
         .m_methods = functions,
+        .m_slots = slots
     };
 
-    m = PyModule_Create(&module_def);
-
-    if (setup_module(m) < 0) {
-        Py_DECREF(m);
-        return NULL;
-    }
-
-#ifdef Py_GIL_DISABLED
-    PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
-#endif
-
-    return m;
+    return PyModuleDef_Init(&module_def);
 }
diff --git a/src/_imagingcms.c b/src/_imagingcms.c
index f93c1613b..e2f29d1b7 100644
--- a/src/_imagingcms.c
+++ b/src/_imagingcms.c
@@ -1463,28 +1463,24 @@ setup_module(PyObject *m) {
     return 0;
 }
 
+static PyModuleDef_Slot slots[] = {
+    {Py_mod_exec, setup_module},
+#ifdef Py_GIL_DISABLED
+    {Py_mod_gil, Py_MOD_GIL_NOT_USED},
+#endif
+    {0, NULL}
+};
+
 PyMODINIT_FUNC
 PyInit__imagingcms(void) {
-    PyObject *m;
+    PyDateTime_IMPORT;
 
     static PyModuleDef module_def = {
         PyModuleDef_HEAD_INIT,
         .m_name = "_imagingcms",
-        .m_size = -1,
         .m_methods = pyCMSdll_methods,
+        .m_slots = slots
     };
 
-    m = PyModule_Create(&module_def);
-
-    if (setup_module(m) < 0) {
-        return NULL;
-    }
-
-    PyDateTime_IMPORT;
-
-#ifdef Py_GIL_DISABLED
-    PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
-#endif
-
-    return m;
+    return PyModuleDef_Init(&module_def);
 }
diff --git a/src/_imagingft.c b/src/_imagingft.c
index 62dab73e5..c3e6e2f39 100644
--- a/src/_imagingft.c
+++ b/src/_imagingft.c
@@ -1599,26 +1599,22 @@ setup_module(PyObject *m) {
     return 0;
 }
 
+static PyModuleDef_Slot slots[] = {
+    {Py_mod_exec, setup_module},
+#ifdef Py_GIL_DISABLED
+    {Py_mod_gil, Py_MOD_GIL_NOT_USED},
+#endif
+    {0, NULL}
+};
+
 PyMODINIT_FUNC
 PyInit__imagingft(void) {
-    PyObject *m;
-
     static PyModuleDef module_def = {
         PyModuleDef_HEAD_INIT,
         .m_name = "_imagingft",
-        .m_size = -1,
         .m_methods = _functions,
+        .m_slots = slots
     };
 
-    m = PyModule_Create(&module_def);
-
-    if (setup_module(m) < 0) {
-        return NULL;
-    }
-
-#ifdef Py_GIL_DISABLED
-    PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
-#endif
-
-    return m;
+    return PyModuleDef_Init(&module_def);
 }
diff --git a/src/_imagingmath.c b/src/_imagingmath.c
index 4b9bf08ba..48c395900 100644
--- a/src/_imagingmath.c
+++ b/src/_imagingmath.c
@@ -302,26 +302,22 @@ setup_module(PyObject *m) {
     return 0;
 }
 
+static PyModuleDef_Slot slots[] = {
+    {Py_mod_exec, setup_module},
+#ifdef Py_GIL_DISABLED
+    {Py_mod_gil, Py_MOD_GIL_NOT_USED},
+#endif
+    {0, NULL}
+};
+
 PyMODINIT_FUNC
 PyInit__imagingmath(void) {
-    PyObject *m;
-
     static PyModuleDef module_def = {
         PyModuleDef_HEAD_INIT,
         .m_name = "_imagingmath",
-        .m_size = -1,
         .m_methods = _functions,
+        .m_slots = slots
     };
 
-    m = PyModule_Create(&module_def);
-
-    if (setup_module(m) < 0) {
-        return NULL;
-    }
-
-#ifdef Py_GIL_DISABLED
-    PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
-#endif
-
-    return m;
+    return PyModuleDef_Init(&module_def);
 }
diff --git a/src/_imagingmorph.c b/src/_imagingmorph.c
index a20888294..5995f9d42 100644
--- a/src/_imagingmorph.c
+++ b/src/_imagingmorph.c
@@ -246,23 +246,22 @@ static PyMethodDef functions[] = {
     {NULL, NULL, 0, NULL}
 };
 
+static PyModuleDef_Slot slots[] = {
+#ifdef Py_GIL_DISABLED
+    {Py_mod_gil, Py_MOD_GIL_NOT_USED},
+#endif
+    {0, NULL}
+};
+
 PyMODINIT_FUNC
 PyInit__imagingmorph(void) {
-    PyObject *m;
-
     static PyModuleDef module_def = {
         PyModuleDef_HEAD_INIT,
         .m_name = "_imagingmorph",
         .m_doc = "A module for doing image morphology",
-        .m_size = -1,
         .m_methods = functions,
+        .m_slots = slots
     };
 
-    m = PyModule_Create(&module_def);
-
-#ifdef Py_GIL_DISABLED
-    PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
-#endif
-
-    return m;
+    return PyModuleDef_Init(&module_def);
 }
diff --git a/src/_imagingtk.c b/src/_imagingtk.c
index 4e06fe9b8..68d7bf4cd 100644
--- a/src/_imagingtk.c
+++ b/src/_imagingtk.c
@@ -46,24 +46,22 @@ static PyMethodDef functions[] = {
     {NULL, NULL} /* sentinel */
 };
 
+static PyModuleDef_Slot slots[] = {
+    {Py_mod_exec, load_tkinter_funcs},
+#ifdef Py_GIL_DISABLED
+    {Py_mod_gil, Py_MOD_GIL_NOT_USED},
+#endif
+    {0, NULL}
+};
+
 PyMODINIT_FUNC
 PyInit__imagingtk(void) {
     static PyModuleDef module_def = {
         PyModuleDef_HEAD_INIT,
         .m_name = "_imagingtk",
-        .m_size = -1,
         .m_methods = functions,
+        .m_slots = slots
     };
-    PyObject *m;
-    m = PyModule_Create(&module_def);
-    if (load_tkinter_funcs() != 0) {
-        Py_DECREF(m);
-        return NULL;
-    }
 
-#ifdef Py_GIL_DISABLED
-    PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
-#endif
-
-    return m;
+    return PyModuleDef_Init(&module_def);
 }
diff --git a/src/_webp.c b/src/_webp.c
index 3aa4c408b..0dff9f6dd 100644
--- a/src/_webp.c
+++ b/src/_webp.c
@@ -777,26 +777,22 @@ setup_module(PyObject *m) {
     return 0;
 }
 
+static PyModuleDef_Slot slots[] = {
+    {Py_mod_exec, setup_module},
+#ifdef Py_GIL_DISABLED
+    {Py_mod_gil, Py_MOD_GIL_NOT_USED},
+#endif
+    {0, NULL}
+};
+
 PyMODINIT_FUNC
 PyInit__webp(void) {
-    PyObject *m;
-
     static PyModuleDef module_def = {
         PyModuleDef_HEAD_INIT,
         .m_name = "_webp",
-        .m_size = -1,
         .m_methods = webpMethods,
+        .m_slots = slots
     };
 
-    m = PyModule_Create(&module_def);
-    if (setup_module(m) < 0) {
-        Py_DECREF(m);
-        return NULL;
-    }
-
-#ifdef Py_GIL_DISABLED
-    PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
-#endif
-
-    return m;
+    return PyModuleDef_Init(&module_def);
 }