diff --git a/src/Setup/MacOSX/postinstall.sh b/src/Setup/MacOSX/postinstall.sh
index 7ce14ffc..3db36d82 100755
--- a/src/Setup/MacOSX/postinstall.sh
+++ b/src/Setup/MacOSX/postinstall.sh
@@ -4,5 +4,7 @@ if !([ -e "/usr/local/lib/libfuse.2.dylib" ])
 then
 	ln -s /usr/local/lib/libosxfuse.2.dylib /usr/local/lib/libfuse.2.dylib
 fi
- 
+
+chmod -R o-w /Applications/VeraCrypt.app
+
 exit 0