diff --git a/chrome/android/webapk/libs/client/src/org/chromium/webapk/lib/client/WebApkVerifySignature.java b/chrome/android/webapk/libs/client/src/org/chromium/webapk/lib/client/WebApkVerifySignature.java
index 3728f27dcfd48..5f0f061ba80e7 100644
--- a/chrome/android/webapk/libs/client/src/org/chromium/webapk/lib/client/WebApkVerifySignature.java
+++ b/chrome/android/webapk/libs/client/src/org/chromium/webapk/lib/client/WebApkVerifySignature.java
@@ -83,8 +83,9 @@ public class WebApkVerifySignature {
     /** Maximum file comment length permitted. */
     private static final int MAX_FILE_COMMENT_LENGTH = 0;
 
-    /** Maximum extra field length permitted. */
-    private static final int MAX_EXTRA_LENGTH = 8;
+    /** Maximum extra field length permitted.
+     * Support .so alignment and a 64 bytes bytes for any extras. */
+    private static final int MAX_EXTRA_LENGTH = 4096 + 64;
 
     /** The memory buffer we are going to read the zip from. */
     private final ByteBuffer mBuffer;
diff --git a/chrome/test/data/webapks/extra-field-too-large.apk b/chrome/test/data/webapks/extra-field-too-large.apk
index a996735d96032..ac0c061a6983e 100644
Binary files a/chrome/test/data/webapks/extra-field-too-large.apk and b/chrome/test/data/webapks/extra-field-too-large.apk differ