diff --git a/scripts/plugin-publication-artifact.mjs b/scripts/plugin-publication-artifact.mjs
index e5d362d72cfa..99f1d06e59ca 100644
--- a/scripts/plugin-publication-artifact.mjs
+++ b/scripts/plugin-publication-artifact.mjs
@@ -37,7 +37,7 @@ const TAR_USTAR_MAGIC = Buffer.from("ustar\0", "ascii");
 const TAR_USTAR_VERSION = Buffer.from("00", "ascii");
 const MAX_ARCHIVE_BYTES = 256 * 1024 * 1024;
 const MAX_EXPANDED_BYTES = 512 * 1024 * 1024;
-const MAX_MANIFEST_BYTES = 2 * 1024 * 1024;
+const MAX_MANIFEST_BYTES = 4 * 1024 * 1024;
 const MAX_PLUGIN_MANIFEST_BYTES = 2 * 1024 * 1024;
 const MAX_TAR_ENTRIES = 10_000;
 const MAX_TAR_PATH_BYTES = 4 * 1024 * 1024;
diff --git a/test/scripts/plugin-publication-artifact.test.ts b/test/scripts/plugin-publication-artifact.test.ts
index 9aaf68784601..e2335be2a4a9 100644
--- a/test/scripts/plugin-publication-artifact.test.ts
+++ b/test/scripts/plugin-publication-artifact.test.ts
@@ -1090,7 +1090,7 @@ describe("plugin publication artifact", () => {
   it("caps publication JSON and tarball members before ZIP expansion", () => {
     const fixture = createFixture();
     const manifest = readFileSync(fixture.created.manifestPath);
-    const oversizedManifest = Buffer.alloc(2 * 1024 * 1024 + 1, 0x20);
+    const oversizedManifest = Buffer.alloc(4 * 1024 * 1024 + 1, 0x20);
 
     replaceArtifactZip(fixture, [
       { bytes: fixture.tarball, name: TARBALL_NAME },