diff --git a/snowpack.config.js b/snowpack.config.js
new file mode 100644
index 00000000..b4fd3b70
--- /dev/null
+++ b/snowpack.config.js
@@ -0,0 +1,35 @@
+// Snowpack Configuration File
+// See all supported options: https://www.snowpack.dev/reference/configuration
+
+/** @type {import("snowpack").SnowpackUserConfig } */
+module.exports = {
+  mount: {
+    "src": "/src",
+    "public": "/",
+    "lib": {url: "/lib", static: true },
+    /* ... */
+  },
+  exclude: [
+    /* Avoid scanning scripts which use dev-dependencies and pull in babel, rollup, etc. */
+    '**/node_modules/**/*', '**/scripts/**', '**/target/**', '**/prototypes/**'
+  ],
+  plugins: [
+    /* ... */
+  ],
+  packageOptions: {
+    /* ... */
+    external: [
+      /* Olm seems to import these but not use them. */
+      "path",
+      "crypto",
+      "fs",
+    ],
+  },
+  devOptions: {
+    open: "none",
+    /* ... */
+  },
+  buildOptions: {
+    /* ... */
+  },
+};
diff --git a/src/domain/session/room/timeline/deserialize.js b/src/domain/session/room/timeline/deserialize.ts
similarity index 100%
rename from src/domain/session/room/timeline/deserialize.js
rename to src/domain/session/room/timeline/deserialize.ts
diff --git a/src/domain/session/room/timeline/tiles/TextTile.js b/src/domain/session/room/timeline/tiles/TextTile.js
index ffd06c1a..10aca813 100644
--- a/src/domain/session/room/timeline/tiles/TextTile.js
+++ b/src/domain/session/room/timeline/tiles/TextTile.js
@@ -16,7 +16,7 @@ limitations under the License.
 
 import {BaseTextTile, BodyFormat} from "./BaseTextTile.js";
 import {parsePlainBody} from "../MessageBody.js";
-import {parseHTMLBody} from "../deserialize.js";
+import {parseHTMLBody} from "../deserialize.ts";
 
 export class TextTile extends BaseTextTile {
     _getContentString(key) {