diff --git a/app/package-lock.json b/app/package-lock.json
index c7af256..f468293 100644
--- a/app/package-lock.json
+++ b/app/package-lock.json
@@ -20,7 +20,7 @@
         "d3-zoom": "^3.0.0",
         "maplibre-gl": "5.13.0",
         "pbf": "^4.0.1",
-        "pmtiles": "^4.3.0",
+        "pmtiles": "^4.4.0",
         "solid-js": "^1.9.5"
       },
       "devDependencies": {
@@ -3474,9 +3474,9 @@
       }
     },
     "node_modules/pmtiles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/pmtiles/-/pmtiles-4.3.0.tgz",
-      "integrity": "sha512-wnzQeSiYT/MyO63o7AVxwt7+uKqU0QUy2lHrivM7GvecNy0m1A4voVyGey7bujnEW5Hn+ZzLdvHPoFaqrOzbPA==",
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/pmtiles/-/pmtiles-4.4.0.tgz",
+      "integrity": "sha512-tCLI1C5134MR54i8izUWhse0QUtO/EC33n9yWp1N5dYLLvyc197U0fkF5gAJhq1TdWO9Tvl+9hgvFvM0fR27Zg==",
       "license": "BSD-3-Clause",
       "dependencies": {
         "fflate": "^0.8.2"
@@ -3634,9 +3634,9 @@
       }
     },
     "node_modules/seroval": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/seroval/-/seroval-1.2.1.tgz",
-      "integrity": "sha512-yBxFFs3zmkvKNmR0pFSU//rIsYjuX418TnlDmc2weaq5XFDqDIV/NOMPBoLrbxjLH42p4UzRuXHryXh9dYcKcw==",
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/seroval/-/seroval-1.5.0.tgz",
+      "integrity": "sha512-OE4cvmJ1uSPrKorFIH9/w/Qwuvi/IMcGbv5RKgcJ/zjA/IohDLU6SVaxFN9FwajbP7nsX0dQqMDes1whk3y+yw==",
       "license": "MIT",
       "engines": {
         "node": ">=10"
diff --git a/app/package.json b/app/package.json
index eb628be..111cc7d 100644
--- a/app/package.json
+++ b/app/package.json
@@ -23,7 +23,7 @@
     "d3-zoom": "^3.0.0",
     "maplibre-gl": "5.13.0",
     "pbf": "^4.0.1",
-    "pmtiles": "^4.3.0",
+    "pmtiles": "^4.4.0",
     "solid-js": "^1.9.5"
   },
   "devDependencies": {
diff --git a/app/src/tileset.ts b/app/src/tileset.ts
index 304f930..df5ebdc 100644
--- a/app/src/tileset.ts
+++ b/app/src/tileset.ts
@@ -54,7 +54,7 @@ export class PMTilesTileset {
 
   async isVector() {
     const h = await this.getHeader();
-    return h.tileType === TileType.Mvt;
+    return h.tileType === TileType.Mvt || h.tileType === TileType.Mlt;
   }
 
   async getHeader() {
@@ -171,7 +171,11 @@ class TileJSONTileset implements Tileset {
     const j = await resp.json();
     const template = j.tiles[0];
     const pathname = new URL(template).pathname;
-    return pathname.endsWith(".pbf") || pathname.endsWith(".mvt");
+    return (
+      pathname.endsWith(".pbf") ||
+      pathname.endsWith(".mvt") ||
+      pathname.endsWith(".mlt")
+    );
   }
 
   getStateUrl() {
diff --git a/python/pmtiles/README.md b/python/pmtiles/README.md
index b69580d..7e3fdb5 100644
--- a/python/pmtiles/README.md
+++ b/python/pmtiles/README.md
@@ -4,6 +4,4 @@
 
 ## Status
 
-This library should be considered experimental.
-
-For async usage, see [aiopmtiles](https://github.com/developmentseed/aiopmtiles) (also experimental)
+For asynchronous I/O, see [aiopmtiles](https://github.com/developmentseed/aiopmtiles)