diff --git a/gpgtool b/gpgtool
index fb12095..ce101ea 100755
--- a/gpgtool
+++ b/gpgtool
@@ -80,6 +80,7 @@ init () {
   # Create temporary working directory:
   local tempdir=$(mktemp -d --tmpdir)
   mkdir ${tempdir}/gpghome
+  chmod 700 ${tempdir}/gpghome
 
   # Save state:
   cat > ${tempdir}/env << EOF