diff --git a/acme.sh b/acme.sh
index 37fd823..60575b5 100755
--- a/acme.sh
+++ b/acme.sh
@@ -1,4 +1,7 @@
 #!/usr/bin/env sh
+
+umask 077
+
 VER=2.2.2
 
 PROJECT_NAME="acme.sh"