diff --git a/frankenphp.c b/frankenphp.c
index af116437d..fab1501b6 100644
--- a/frankenphp.c
+++ b/frankenphp.c
@@ -33,7 +33,10 @@
 ZEND_TSRMLS_CACHE_DEFINE()
 #endif
 
-static const char *MODULES_TO_RELOAD[] = {"filter", "session", NULL};
+#define INITIAL_MODULES_CAPACITY 8
+
+static const char *MODULES_TO_RELOAD[] = {"filter", "session"};
+frankenphp_modules_to_reload modules_to_reload = {NULL, 0, 0};
 
 frankenphp_version frankenphp_get_version() {
   return (frankenphp_version){
@@ -115,18 +118,42 @@ static void frankenphp_release_temporary_streams() {
   ZEND_HASH_FOREACH_END();
 }
 
+static void init_modules_to_reload(void) {
+  if (modules_to_reload.names != NULL) {
+    return;
+  }
+
+  size_t length = sizeof MODULES_TO_RELOAD / sizeof *MODULES_TO_RELOAD;
+
+  size_t capacity = length > 0 ? length * 2 : INITIAL_MODULES_CAPACITY;
+  modules_to_reload.names = malloc(capacity * sizeof(char *));
+  if (!modules_to_reload.names) {
+    return; // TODO: handle this as an error
+  }
+
+  for (size_t i = 0; i < length; i++) {
+    modules_to_reload.names[i] = strdup(MODULES_TO_RELOAD[i]);
+  }
+
+  modules_to_reload.length = length;
+  modules_to_reload.capacity = capacity;
+}
+
 /* Adapted from php_request_shutdown */
 static void frankenphp_worker_request_shutdown() {
   /* Flush all output buffers */
   zend_try { php_output_end_all(); }
   zend_end_try();
 
-  /* TODO: store the list of modules to reload in a global module variable */
-  const char **module_name;
+  init_modules_to_reload();
+
   zend_module_entry *module;
-  for (module_name = MODULES_TO_RELOAD; *module_name; module_name++) {
-    if ((module = zend_hash_str_find_ptr(&module_registry, *module_name,
-                                         strlen(*module_name)))) {
+  for (size_t i = 0; i < modules_to_reload.length; i++) {
+    module =
+        zend_hash_str_find_ptr(&module_registry, modules_to_reload.names[i],
+                               strlen(modules_to_reload.names[i]));
+
+    if (module && module->request_shutdown_func) {
       module->request_shutdown_func(module->type, module->module_number);
     }
   }
@@ -144,6 +171,37 @@ static void frankenphp_worker_request_shutdown() {
   zend_set_memory_limit(PG(memory_limit));
 }
 
+/* API for extensions to register their modules to reload */
+bool frankenphp_register_module_to_reload(const char *module_name) {
+  if (module_name == NULL) {
+    return false;
+  }
+
+  init_modules_to_reload();
+
+  for (size_t i = 0; i < modules_to_reload.length; i++) {
+    if (strcmp(modules_to_reload.names[i], module_name) == 0) {
+      return true;
+    }
+  }
+
+  if (modules_to_reload.length >= modules_to_reload.capacity) {
+    size_t new_capacity = modules_to_reload.capacity * 2;
+    const char **new_names =
+        realloc(modules_to_reload.names, new_capacity * sizeof(char *));
+    if (!new_names) {
+      return false; // Out of memory
+    }
+    modules_to_reload.names = new_names;
+    modules_to_reload.capacity = new_capacity;
+  }
+
+  modules_to_reload.names[modules_to_reload.length] = strdup(module_name);
+  modules_to_reload.length++;
+
+  return true;
+}
+
 // shutdown the dummy request that starts the worker script
 bool frankenphp_shutdown_dummy_request(void) {
   if (SG(server_context) == NULL) {
@@ -223,13 +281,15 @@ static int frankenphp_worker_request_startup() {
       }
     }
 
-    /* TODO: store the list of modules to reload in a global module variable */
-    const char **module_name;
+    init_modules_to_reload();
+
+    /* Reload modules */
     zend_module_entry *module;
-    for (module_name = MODULES_TO_RELOAD; *module_name; module_name++) {
-      if ((module = zend_hash_str_find_ptr(&module_registry, *module_name,
-                                           strlen(*module_name))) &&
-          module->request_startup_func) {
+    for (size_t i = 0; i < modules_to_reload.length; i++) {
+      module =
+          zend_hash_str_find_ptr(&module_registry, modules_to_reload.names[i],
+                                 strlen(modules_to_reload.names[i]));
+      if (module && module->request_startup_func) {
         module->request_startup_func(module->type, module->module_number);
       }
     }
diff --git a/frankenphp.h b/frankenphp.h
index 7839bcf7e..1b61778ef 100644
--- a/frankenphp.h
+++ b/frankenphp.h
@@ -46,6 +46,12 @@ typedef struct frankenphp_config {
 } frankenphp_config;
 frankenphp_config frankenphp_get_config();
 
+typedef struct {
+  const char **names;
+  size_t length;
+  size_t capacity;
+} frankenphp_modules_to_reload;
+
 int frankenphp_new_main_thread(int num_threads);
 bool frankenphp_new_php_thread(uintptr_t thread_index);
 
@@ -91,4 +97,6 @@ void frankenphp_register_bulk(
     ht_key_value_pair auth_type, ht_key_value_pair remote_ident,
     ht_key_value_pair request_uri);
 
+bool frankenphp_register_module_to_reload(const char *module_name);
+
 #endif