diff --git a/mechanisms/generate_catalogue b/mechanisms/generate_catalogue
index fe821756e65b820e1b0a2f15de58858e1a68cb77..072b1d1c7fe8885913cd51a4e2b50bbafc6a4d46 100755
--- a/mechanisms/generate_catalogue
+++ b/mechanisms/generate_catalogue
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Note: compatible with Python2.7 and Python3.