diff --git a/README.md b/README.md
index 1ff76498..cdc2b34a 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,27 @@ This repository is a collection of assorted [Expo config plugins](https://docs.e
 
 - **We maintain a one-to-one mapping between native packages and `@config-plugins/*`**. This means there should be no general utility packages here — those are better suited for a different repository or npm namespace.
 
+
+## Expo SDK compatibility
+
+Each plugin documents its own version mapping in its package README. Use those tables when pinning versions — mismatched Expo SDK and `@config-plugins/*` majors are a common cause of prebuild/native build failures.
+
+**Latest published major for Expo SDK 56** (see each package README for full history and matching upstream library versions):
+
+| Package | `@config-plugins/*` (SDK 56) |
+| --- | --- |
+| [`apple-settings`](./packages/apple-settings/README.md) | ^8.0.0 |
+| [`ios-stickers`](./packages/ios-stickers/README.md) | 14.0.0 |
+| [`react-native-adjust`](./packages/react-native-adjust/README.md) | 14.0.0 |
+| [`react-native-blob-util`](./packages/react-native-blob-util/README.md) | 14.0.0 |
+| [`react-native-branch`](./packages/react-native-branch/README.md) | 13.0.0 |
+| [`react-native-callkeep`](./packages/react-native-callkeep/README.md) | 14.0.0 |
+| [`react-native-pdf`](./packages/react-native-pdf/README.md) | 14.0.0 |
+| [`react-native-siri-shortcut`](./packages/react-native-siri-shortcut/README.md) | 13.0.0 |
+| [`react-native-webrtc`](./packages/react-native-webrtc/README.md) | 15.0.0 |
+
+When upgrading Expo SDK, bump the matching `@config-plugins/*` major from the package README (and the upstream native library version listed there) before running `npx expo prebuild`.
+
 ## Looking for other config plugins?
 
 Many React Native libraries ship their own built-in config plugins. You can find them on the [React Native Directory](https://reactnative.directory/).
diff --git a/packages/react-native-branch/README.md b/packages/react-native-branch/README.md
index 3a7df565..953b04e9 100644
--- a/packages/react-native-branch/README.md
+++ b/packages/react-native-branch/README.md
@@ -13,7 +13,7 @@ Ensure you use versions that work together!
 | 54.0.0 | 6.8.0                   | 11.0.0                                |
 | 53.0.0 | 6.6.0                   | 10.0.0                                |
 | 52.0.0 | 6.4.0                   | 9.0.0                                 |
-| 51.0.0 | 6.2.1                 3 | 8.0.0                                 |
+| 51.0.0 | 6.2.1                   | 8.0.0                                 |
 | 50.0.0 | 6.0.0                   | 7.0.0                                 |
 | 49.0.0 | 5.9.0                   | 6.0.0                                 |
 | 48.0.0 | 5.7.0                   | 5.0.0                                 |