diff --git a/xwords4/android/scripts/sign-align.sh b/xwords4/android/scripts/sign-align.sh
index 4b4b399f4..ad37ca5da 100755
--- a/xwords4/android/scripts/sign-align.sh
+++ b/xwords4/android/scripts/sign-align.sh
@@ -40,6 +40,8 @@ for APK in $APKS; do
 	rm -f ${OUTNAME}
     zipalign -v 4 $APK_SIGNED ${OUTNAME}
 
+	apksigner sign --ks ~/.keystore ${OUTNAME}
+
 	rm -f $APK_SIGNED
 	echo "saved as $OUTNAME"
 done