diff --git a/setup/dkim.sh b/setup/dkim.sh
index 35b059ad..c1420bdf 100755
--- a/setup/dkim.sh
+++ b/setup/dkim.sh
@@ -50,7 +50,7 @@ if [ ! -f "$STORAGE_ROOT/mail/dkim/box-rsa.key" ]; then
 	dknewkey --ktype rsa $STORAGE_ROOT/mail/dkim/box-rsa
 	# Change format from pkcs#8 to pkcs#1, dkimpy seemingly is not able to handle the #8 format
 	openssl pkey -in $STORAGE_ROOT/mail/dkim/box-rsa.key -traditional -out $STORAGE_ROOT/mail/dkim/box-rsa.key.1
-	mv $STORAGE_ROOT/mail/dkim/box-rsa.key $STORAGE_ROOT/mail/dkim/box-rsa.key.8
+	mv -f $STORAGE_ROOT/mail/dkim/box-rsa.key $STORAGE_ROOT/mail/dkim/box-rsa.key.8
 	cp -f $STORAGE_ROOT/mail/dkim/box-rsa.key.1 $STORAGE_ROOT/mail/dkim/box-rsa.key
 	
 	dknewkey --ktype ed25519 $STORAGE_ROOT/mail/dkim/box-ed25519