diff --git a/.gitmodules b/.gitmodules
index a52a791..e69de29 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +0,0 @@
-[submodule "inwx"]
-	path = inwx
-	url = https://github.com/inwx/python-client.git
diff --git a/certbot-dns-auth.py b/certbot-dns-auth.py
index c57d053..316ed94 100755
--- a/certbot-dns-auth.py
+++ b/certbot-dns-auth.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 """
 Created on Thu May 31 17:23:20 2018
@@ -31,7 +31,7 @@
 	os.system(cmd)
 
 	# sleep to make sure the change has time to propagate over to DNS
-	time.sleep(25)
+	time.sleep(10)
 # end main
 
 
diff --git a/certbot-dns-clean.py b/certbot-dns-clean.py
index c35dd6a..864190d 100755
--- a/certbot-dns-clean.py
+++ b/certbot-dns-clean.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 """
 Created on Thu May 31 17:23:20 2018
diff --git a/inwx b/inwx
deleted file mode 160000
index ba6aca6..0000000
--- a/inwx
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit ba6aca6982bd4b0099a0e33b10ac6f46cdb3fbf4