diff --git a/mobile/app.json b/mobile/app.json
index ccc0189..79815a4 100644
--- a/mobile/app.json
+++ b/mobile/app.json
@@ -6,7 +6,7 @@
     "orientation": "portrait",
     "userInterfaceStyle": "automatic",
     "newArchEnabled": false,
-    "runtimeVersion": "1.0",
+    "runtimeVersion": "0.1.9",
     "updates": {
       "enabled": true,
       "url": "https://api.goon-foss.org/expo-updates/manifest",
diff --git a/scripts/publish_update.py b/scripts/publish_update.py
index 8e47048..d371406 100644
--- a/scripts/publish_update.py
+++ b/scripts/publish_update.py
@@ -29,7 +29,7 @@ from pathlib import Path
 ROOT = Path(__file__).resolve().parent.parent
 MOBILE = ROOT / "mobile"
 DIST = MOBILE / "dist"
-RUNTIME_DEFAULT = "1.0"
+RUNTIME_DEFAULT = "0.1.9"  # MUSI == EXPO_RUNTIME_VERSION w APK (AndroidManifest). Zweryfikowane 2026-05-31.
 # Operator config — set in your shell / .env.local before running this script.
 # Defaults are placeholders intended to fail loudly if you forgot to configure.
 VPS = os.environ.get("GOON_VPS_SSH", "root@your-vps.example.com")