diff --git a/apex/apex.go b/apex/apex.go
index d879883..aad7c65 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -662,6 +662,7 @@
 		Input:       unsignedOutputFile,
 		Args: map[string]string{
 			"certificates": strings.Join([]string{certificate.Pem.String(), certificate.Key.String()}, " "),
+			"flags":        "-a 4096", //alignment
 		},
 	})
 }
diff --git a/java/app_builder.go b/java/app_builder.go
index b0983bd..28fc4c4 100644
--- a/java/app_builder.go
+++ b/java/app_builder.go
@@ -32,10 +32,10 @@
 	Signapk = pctx.AndroidStaticRule("signapk",
 		blueprint.RuleParams{
 			Command: `${config.JavaCmd} -Djava.library.path=$$(dirname $signapkJniLibrary) ` +
-				`-jar $signapkCmd $certificates $in $out`,
+				`-jar $signapkCmd $flags $certificates $in $out`,
 			CommandDeps: []string{"$signapkCmd", "$signapkJniLibrary"},
 		},
-		"certificates")
+		"flags", "certificates")
 
 	androidManifestMerger = pctx.AndroidStaticRule("androidManifestMerger",
 		blueprint.RuleParams{