diff --git a/deno.json b/deno.json
index 62e46b5..1851865 100644
--- a/deno.json
+++ b/deno.json
@@ -24,9 +24,9 @@
     "@twind/core": "https://esm.sh/@twind/core@1.1.3",
     "@twind/preset-tailwind": "https://esm.sh/@twind/preset-tailwind@1.1.4/",
     "@twind/preset-autoprefix": "https://esm.sh/@twind/preset-autoprefix@1.0.7/",
-    "$std/": "https://deno.land/std@0.219.0/",
-    "mtkruto/": "https://deno.land/x/mtkruto@0.1.301/",
-    "grammy/": "https://deno.land/x/grammy@v1.21.1/",
+    "$std/": "https://deno.land/std@0.224.0/",
+    "mtkruto/": "https://deno.land/x/mtkruto@0.2.3/",
+    "grammy/": "https://deno.land/x/grammy@v1.23.0/",
     "dexie": "https://esm.sh/dexie@3.2.6",
     "dexie-react-hooks": "https://esm.sh/dexie-react-hooks@1.1.7?alias=react:preact/compat",
     "prism-json": "https://esm.sh/prismjs@1.29.0/components/prism-json?no-check",
diff --git a/workers/connectivity_test.ts b/workers/connectivity_test.ts
index c16a86d..4fca97f 100644
--- a/workers/connectivity_test.ts
+++ b/workers/connectivity_test.ts
@@ -28,8 +28,7 @@ async function handleMessage(
       postMessage("exchanging-encryption-keys");
       authKey = await getAuthKey(initialDc);
     }
-    /** @type string */
-    let authString;
+    let authString: string;
     {
       const writer = new TLWriter();
       writer.writeString(initialDc);
@@ -40,7 +39,8 @@ async function handleMessage(
       authString = base64EncodeUrlSafe(rleEncode(writer.buffer));
     }
     postMessage(authKey);
-    client = new Client(new StorageMemory(authString));
+    client = new Client({ storage: new StorageMemory() });
+    await client.importAuthString(authString);
     await client.connect();
   } catch (err) {
     console.error(err);
@@ -53,7 +53,7 @@ async function handleMessage(
     for (let i = 0; i < 10; i++) {
       const then = now();
       try {
-        await client.api.ping({ ping_id: getRandomId() });
+        await client.invoke({ _: "ping", ping_id: getRandomId() });
       } catch (err) {
         if (
           i == 0 && !regenerateAuthKey && String(err).includes("was closed") // TODO: Use MTKruto's ConnectionError with instanceof