diff --git a/src/config.ts b/src/config.ts
index f528def2..2903c0fb 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -284,14 +284,25 @@ export async function save(storage: "local" | "sync" = get("storageloc")){
 }
 
 /** Updates the config to the latest version. */
-export function update() {
+export async function update() {
     let updaters = {
+        "0.0": async () => {
+            try {
+                // Before we had a config system, we had nmaps, and we put them in the
+                // root namespace because we were young and bold.
+                let legacy_nmaps = await browser.storage.sync.get("nmaps")
+                if (legacy_nmaps) {
+                    USERCONFIG["nmaps"] = Object.assign(legacy_nmaps["nmaps"], USERCONFIG["nmaps"])
+                }
+            } finally {
+                set("version", "1.0")
+            }
         },
     }
     if (!get("version"))
         set("version", "0.0")
     while (updaters[get("version")] instanceof Function) {
-        updaters[get("version")]()
+        await updaters[get("version")]()
     }
 }
 
@@ -300,25 +311,15 @@ export function update() {
     asynchronous calls generated by getAsync.
 */
 async function init() {
-    try {
-        let syncConfig = await browser.storage.sync.get(CONFIGNAME)
-        schlepp(syncConfig[CONFIGNAME])
-        // Local storage overrides sync
-        let localConfig = await browser.storage.local.get(CONFIGNAME)
-        schlepp(localConfig[CONFIGNAME])
-
-        // Before we had a config system, we had nmaps, and we put them in the
-        // root namespace because we were young and bold.
-        let legacy_nmaps = await browser.storage.sync.get("nmaps")
-        if (legacy_nmaps) {
-            USERCONFIG["nmaps"] = Object.assign(legacy_nmaps["nmaps"], USERCONFIG["nmaps"])
-        }
-    } finally {
-        update()
-        INITIALISED = true
-        for (let waiter of WAITERS) {
-            waiter()
-        }
+    let syncConfig = await browser.storage.sync.get(CONFIGNAME)
+    schlepp(syncConfig[CONFIGNAME])
+    // Local storage overrides sync
+    let localConfig = await browser.storage.local.get(CONFIGNAME)
+    schlepp(localConfig[CONFIGNAME])
+    await update()
+    INITIALISED = true
+    for (let waiter of WAITERS) {
+        waiter()
     }
 }