diff --git a/README b/README
index 57d6286..fc52fa1 100644
--- a/README
+++ b/README
@@ -7,17 +7,29 @@
 ------
 
 The prebuilt libwebviewchromium.so included in these APKs is built from Chromium
-release tag 44.0.2403.114. To match our build settings, set:
+release tag 51.0.2693.3, using the GN build tool (not the older GYP tool). To match our build settings, set:
 
-GYP_DEFINES="OS=android release_unwind_tables=0 buildtype=Official chrome_build_id='2e7c7a0f-c733-4b9a-9c8e-d3cf0938369b'"
+target_os="android"
+is_debug=false
+is_official_build=true
+is_chrome_branded=false
+use_official_google_api_keys=false
+exclude_unwind_tables=true
+enable_resource_whitelist_generation=true
+ffmpeg_branding="Chrome"
+proprietary_codecs=true
+enable_remoting=true
+android_default_version_code="269300300"
+android_default_version_name="51.0.2693.3"
+android_chrome_build_id="f76e63c0-7c31-4190-8c13-8421d00a1b64"
 
-in your environment before running build/gyp_chromium.
+in your GN argument file before building.
 
 ------
 
-Due to WebView API changes in the M release, the Java code in the Chromium 2403
-branch is not compatible with M. We'll be working on upstreaming the M-specific
-Java changes to Chromium once the final M SDK is released.
+Due to WebView API changes in the N release, the Java code in the Chromium 2693
+branch is not compatible with N. We'll be working on upstreaming the N-specific
+Java changes to Chromium once the final N SDK is released.
 
 ------
 
diff --git a/prebuilt/arm/webview.apk b/prebuilt/arm/webview.apk
index 0c9d6cd..03870ae 100644
--- a/prebuilt/arm/webview.apk
+++ b/prebuilt/arm/webview.apk
Binary files differ
diff --git a/prebuilt/arm64/webview.apk b/prebuilt/arm64/webview.apk
index 6771698..671bbd5 100644
--- a/prebuilt/arm64/webview.apk
+++ b/prebuilt/arm64/webview.apk
Binary files differ
diff --git a/prebuilt/mips/webview.apk b/prebuilt/mips/webview.apk
index b3702be..343d7a0 100644
--- a/prebuilt/mips/webview.apk
+++ b/prebuilt/mips/webview.apk
Binary files differ
diff --git a/prebuilt/x86/webview.apk b/prebuilt/x86/webview.apk
index f6463ad..d12c49d 100644
--- a/prebuilt/x86/webview.apk
+++ b/prebuilt/x86/webview.apk
Binary files differ
diff --git a/prebuilt/x86_64/webview.apk b/prebuilt/x86_64/webview.apk
index 105b64c..dc75161 100644
--- a/prebuilt/x86_64/webview.apk
+++ b/prebuilt/x86_64/webview.apk
Binary files differ