diff --git a/build-tgr.sh b/build-tgr.sh
index 97acbf9..e38f19d 100755
--- a/build-tgr.sh
+++ b/build-tgr.sh
@@ -59,8 +59,8 @@ mkdir -p home/update
 echo "sample update" > home/update/sample.txt
 tar -cvzf update.tgz home
 openssl dgst -sha256 -sign target/keys/signingkey.pem -out update.tgz.sig update.tgz
-cat update.tgz.sig > update.tgz.cc
-cat update.tgz >> update.tgz.cc
+cat update.tgz > update.tgz.cc
+cat update.tgz.sig >> update.tgz.cc
 mv update.tgz.cc target/overlay
 rm -rf home update.tgz update.tgz.sig