diff --git a/website/package-lock.json b/website/package-lock.json
index 2c6b94be4..a7f44333c 100644
--- a/website/package-lock.json
+++ b/website/package-lock.json
@@ -20,7 +20,7 @@
                 "mapillary-js": "^4.1.2",
                 "maplibre-gl": "^6.15.0",
                 "sanitize-html": "^2.17.0",
-                "sortablejs": "^1.15.6"
+                "sortablejs": "^1.15.7"
             },
             "devDependencies": {
                 "@fontsource-variable/inter": "^5.2.8",
@@ -39,7 +39,7 @@
                 "@types/mapbox__tilebelt": "^1.0.4",
                 "@types/node": "^22.15.30",
                 "@types/sanitize-html": "^2.16.0",
-                "@types/sortablejs": "^1.15.8",
+                "@types/sortablejs": "^1.15.9",
                 "@typescript-eslint/eslint-plugin": "^8.33.1",
                 "@typescript-eslint/parser": "^8.33.1",
                 "bits-ui": "^2.17.2",
@@ -2762,6 +2762,8 @@
         },
         "node_modules/@types/sortablejs": {
             "version": "1.15.9",
+            "resolved": "https://registry.npmjs.org/@types/sortablejs/-/sortablejs-1.15.9.tgz",
+            "integrity": "sha512-7HP+rZGE2p886PKV9c9OJzLBI6BBJu1O7lJGYnPyG3fS4/duUCcngkNCjsLwIMV+WMqANe3tt4irrXHSIe68OQ==",
             "dev": true,
             "license": "MIT"
         },
@@ -5599,6 +5601,8 @@
         },
         "node_modules/sortablejs": {
             "version": "1.15.7",
+            "resolved": "https://registry.npmjs.org/sortablejs/-/sortablejs-1.15.7.tgz",
+            "integrity": "sha512-Kk8wLQPlS+yi1ZEf48a4+fzHa4yxjC30M/Sr2AnQu+f/MPwvvX9XjZ6OWejiz8crBsLwSq8GHqaxaET7u6ux0A==",
             "license": "MIT"
         },
         "node_modules/source-map-js": {
diff --git a/website/package.json b/website/package.json
index f397cbbf8..85fd17a71 100644
--- a/website/package.json
+++ b/website/package.json
@@ -33,7 +33,7 @@
         "@types/mapbox__tilebelt": "^1.0.4",
         "@types/node": "^22.15.30",
         "@types/sanitize-html": "^2.16.0",
-        "@types/sortablejs": "^1.15.8",
+        "@types/sortablejs": "^1.15.9",
         "@typescript-eslint/eslint-plugin": "^8.33.1",
         "@typescript-eslint/parser": "^8.33.1",
         "bits-ui": "^2.17.2",
@@ -80,6 +80,6 @@
         "mapillary-js": "^4.1.2",
         "maplibre-gl": "^6.15.0",
         "sanitize-html": "^2.17.0",
-        "sortablejs": "^1.15.6"
+        "sortablejs": "^1.15.7"
     }
 }
diff --git a/website/src/lib/components/file-list/sortable-file-list.ts b/website/src/lib/components/file-list/sortable-file-list.ts
index 045d57b63..2a7fe6d7b 100644
--- a/website/src/lib/components/file-list/sortable-file-list.ts
+++ b/website/src/lib/components/file-list/sortable-file-list.ts
@@ -1,5 +1,6 @@
 import { isMac } from '$lib/utils';
-import Sortable, { type Direction } from 'sortablejs/Sortable';
+import Sortable from './sortable';
+import type { Direction } from 'sortablejs';
 import { get, writable } from 'svelte/store';
 import { tick } from 'svelte';
 import { engine, type MoveTarget, type Selection } from '$lib/engine';
@@ -258,7 +259,7 @@ export class SortableFileList {
         }
     }
 
-    updateToSelection(e: Sortable.SortableEvent) {
+    updateToSelection(e: Sortable.SortableEvent & { originalEvent?: MouseEvent }) {
         if (!this._sortable) return;
         if (this._updatingSelection || this._applying) return;
         this._updatingSelection = true;
diff --git a/website/src/lib/components/file-list/sortable.ts b/website/src/lib/components/file-list/sortable.ts
new file mode 100644
index 000000000..e138d8a4c
--- /dev/null
+++ b/website/src/lib/components/file-list/sortable.ts
@@ -0,0 +1,7 @@
+import Sortable, { MultiDrag } from 'sortablejs';
+
+// The ESM build leaves out the MultiDrag plugin. Mounting it twice throws, so it is done here
+// rather than in a module that hot reloading runs again.
+Sortable.mount(new MultiDrag());
+
+export default Sortable;
diff --git a/website/src/lib/components/map/street-view-control/mapillary.ts b/website/src/lib/components/map/street-view-control/mapillary.ts
index b081e2813..9cd228f1e 100644
--- a/website/src/lib/components/map/street-view-control/mapillary.ts
+++ b/website/src/lib/components/map/street-view-control/mapillary.ts
@@ -5,7 +5,7 @@ import {
     type MapLayerMouseEvent,
     type VectorSourceSpecification,
 } from 'maplibre-gl';
-import { Viewer, type ViewerBearingEvent } from 'mapillary-js/dist/mapillary.module';
+import { Viewer, type ViewerBearingEvent } from 'mapillary-js';
 import 'mapillary-js/dist/mapillary.css';
 import { mapCursor, MapCursorState } from '$lib/state/map-cursor';
 import { ANCHOR_LAYER_KEY } from '$lib/components/map/style';
diff --git a/website/vite.config.ts b/website/vite.config.ts
index 0fdebafa5..6ba129dd3 100644
--- a/website/vite.config.ts
+++ b/website/vite.config.ts
@@ -47,4 +47,8 @@ export default defineConfig({
         wasm(),
         sveltekit(),
     ],
+    ssr: {
+        // their main entry is UMD, which has no named exports in Node: bundle their ESM build instead
+        noExternal: ['mapillary-js', 'sortablejs'],
+    },
 });