diff --git a/.github/workflows/apk.yml b/.github/workflows/apk.yml
index 8f844b3..fc0019e 100644
--- a/.github/workflows/apk.yml
+++ b/.github/workflows/apk.yml
@@ -97,11 +97,11 @@ jobs:
           "$BT/apksigner" verify --verbose --print-certs "$APK" | tee verify.txt
           grep -q "Number of signers: 1" verify.txt
           GOT=$(sed -n 's/.*certificate SHA-256 digest: //p' verify.txt | sed -n 1p)
-          WANT=$(jq -r '.[].target | select(.package_name=="chat.sune") | .sha256_cert_fingerprints[]' "$GITHUB_WORKSPACE/public/.well-known/assetlinks.json" | tr -d ':' | tr A-F a-f)
+          WANT=$(jq -r '.[].target | select(.package_name=="chat.sune.app") | .sha256_cert_fingerprints[]' "$GITHUB_WORKSPACE/public/.well-known/assetlinks.json" | tr -d ':' | tr A-F a-f)
           [ "$GOT" = "$WANT" ] || { echo "::error::signing cert $GOT does not match assetlinks.json ($WANT)"; exit 1; }
           "$BT/aapt2" dump badging "$APK" > full-badging.txt
           grep -m1 '^package:' full-badging.txt | tee badging.txt
-          grep -q "name='chat.sune' versionCode='$CODE' versionName='$VERSION'" badging.txt
+          grep -q "name='chat.sune.app' versionCode='$CODE' versionName='$VERSION'" badging.txt
           sha256sum "$APK" | tee "$APK.sha256"
           echo "SIGNER=$GOT" >> $GITHUB_ENV
 
@@ -126,7 +126,7 @@ jobs:
           gh attestation verify $APK --repo $GITHUB_REPOSITORY
           \`\`\`
 
-          - Package: \`chat.sune\`
+          - Package: \`chat.sune.app\`
           - SHA-256: \`$SHA\`
           - Signing certificate SHA-256: \`$SIGNER\`
           EOF
diff --git a/android/README.md b/android/README.md
index b47f182..96a622d 100644
--- a/android/README.md
+++ b/android/README.md
@@ -4,7 +4,7 @@ Sune for Android is a [Trusted Web Activity](https://developer.chrome.com/docs/a
 
 | | New app | Legacy app (v0.x) |
 |---|---|---|
-| Package | `chat.sune` | `com.planetrenox.sune` |
+| Package | `chat.sune.app` | `com.planetrenox.sune` |
 | Host | `sune.chat` (also trusts `sune.planetrenox.com`) | `sune.planetrenox.com` |
 | Signing cert SHA-256 | `09:85:1F:7B:BB:40:67:9C:F8:70:1C:7D:9F:65:72:77:78:0E:C0:58:CF:34:09:9A:97:D2:8A:74:FB:CE:87:2A` | `E8:7D:70:60:C2:7D:EF:CB:4D:4D:2B:E2:2E:5E:37:ED:F7:0B:1E:F5:77:D7:04:1F:6B:07:EC:B8:1D:78:6D:43` (**leaked**) |
 
@@ -34,4 +34,4 @@ Never in the repo (`*.jks` is gitignored). Repo secrets, read only by `.github/w
 | `ANDROID_KEYSTORE_PASS` | keystore password (also used as the key password) |
 | `ANDROID_KEY_ALIAS` | `sune` |
 
-Losing this key means users can't update `chat.sune` and would have to uninstall and reinstall. Keep an offline copy.
+Losing this key means users can't update `chat.sune.app` and would have to uninstall and reinstall. Keep an offline copy.
diff --git a/android/twa-manifest.json b/android/twa-manifest.json
index f0f9a2a..a6255fa 100644
--- a/android/twa-manifest.json
+++ b/android/twa-manifest.json
@@ -1,5 +1,5 @@
 {
-  "packageId": "chat.sune",
+  "packageId": "chat.sune.app",
   "host": "sune.chat",
   "name": "Sune",
   "launcherName": "Sune",
diff --git a/dist/.well-known/assetlinks.json b/dist/.well-known/assetlinks.json
index 3756bef..18653c5 100644
--- a/dist/.well-known/assetlinks.json
+++ b/dist/.well-known/assetlinks.json
@@ -13,7 +13,7 @@
     "relation": ["delegate_permission/common.handle_all_urls"],
     "target": {
       "namespace": "android_app",
-      "package_name": "chat.sune",
+      "package_name": "chat.sune.app",
       "sha256_cert_fingerprints": [
         "09:85:1F:7B:BB:40:67:9C:F8:70:1C:7D:9F:65:72:77:78:0E:C0:58:CF:34:09:9A:97:D2:8A:74:FB:CE:87:2A"
       ]
diff --git a/public/.well-known/assetlinks.json b/public/.well-known/assetlinks.json
index 3756bef..18653c5 100644
--- a/public/.well-known/assetlinks.json
+++ b/public/.well-known/assetlinks.json
@@ -13,7 +13,7 @@
     "relation": ["delegate_permission/common.handle_all_urls"],
     "target": {
       "namespace": "android_app",
-      "package_name": "chat.sune",
+      "package_name": "chat.sune.app",
       "sha256_cert_fingerprints": [
         "09:85:1F:7B:BB:40:67:9C:F8:70:1C:7D:9F:65:72:77:78:0E:C0:58:CF:34:09:9A:97:D2:8A:74:FB:CE:87:2A"
       ]