diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000000000000000000000000000000000000..5f2e591f41ff208ea55cbcbc7b013315a1132c9e
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,19 @@
+# Contributing
+
+If you have any issues or ideas for improvement you can send me an email to _thl-cmk[at]outlook[dot]com_.
+
+For some fixes/improvements I migth need a _snmpwalk_ fom the device in question.
+This must contain
+
+- .1.3.6.1.2.1.1.1 sysDescr 
+- .1.3.6.1.2.1.1.2 sysObjectID
+
+and all the SNMP OIDs used in the plugin.
+
+If you run the _snmpwalk_ command, please uses these options _**-ObentU**_ in addition to your snmp options like community, version etc.
+For example:
+```
+snmpwalk -v2c -c public -ObentU 10.10.10.10 .1.3.6.1.2.1.1.1 > hostname.snmpwalk
+snmpwalk -v2c -c public -ObentU 10.10.10.10 .1.3.6.1.2.1.1.2 >> hostname.snmpwalk
+snmpwalk -v2c -c public -ObentU 10.10.10.10 .1.3.6.1.4.1.2620.1.6.18.2 >> hostname.snmpwalk
+```
diff --git a/README.md b/README.md
index 5e242d007732e8eec53ce665ae08eee229d8e0a8..35ddf082b60d57c3d8cbe10edf409baa0f303815 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# License/support of Check Point systems
+# License/support of Check Point systems [(Download the MKP package)](/../../../-/raw/master/inv_checkpoint_support.mkp "Download MKP package")
 
 **Note: this package is for CheckMK version 2.x. For other versions see the corresponding branch.**
 
@@ -6,5 +6,10 @@ adds the following to the inventory:
 
 * License/support status
 
+---
+#### Want to contribute?
+Nice ;-) Have a look at the [contribution guidelines](CONTRIBUTING.md "Contributing")
+---
+
 Here is a sample inventory
 ![sample Check point inventory](/doc/sample.png?raw=true "sample Check Point inventory")
\ No newline at end of file
diff --git a/agent_based/inv_checkpoint_support.py b/agent_based/inv_checkpoint_support.py
index 9ab2cbaf069dfcc39da2b5fe1c93a7299259b2e0..70f3305cce6d4a3a6a96599d0cee695a85160420 100644
--- a/agent_based/inv_checkpoint_support.py
+++ b/agent_based/inv_checkpoint_support.py
@@ -26,11 +26,11 @@ import time
 
 from typing import List, NamedTuple
 
-from .agent_based_api.v1.type_defs import (
+from cmk.base.plugins.agent_based.agent_based_api.v1.type_defs import (
     StringTable,
     InventoryResult,
 )
-from .agent_based_api.v1 import (
+from cmk.base.plugins.agent_based.agent_based_api.v1 import (
     register,
     SNMPTree,
     TableRow,
diff --git a/inv_checkpoint_support.mkp b/inv_checkpoint_support.mkp
index 0097ccd3c99b7cfd919a60035951162e34ac9647..893e3a9e9fcd52a01647e1a3698998abc10faded 100644
Binary files a/inv_checkpoint_support.mkp and b/inv_checkpoint_support.mkp differ
diff --git a/packages/inv_checkpoint_support b/packages/inv_checkpoint_support
index 5a0395cccc682b707d8ecfb8aa0fcd0de8353372..046d1265b58d3f8886bb4912f0a003bd1cf55b8c 100644
--- a/packages/inv_checkpoint_support
+++ b/packages/inv_checkpoint_support
@@ -9,5 +9,5 @@
  'title': 'Check Point appliance support inventory plugin',
  'version': '20210208.v.0.1',
  'version.min_required': '2.0.0b8',
- 'version.packaged': '2.0.0p1',
+ 'version.packaged': '2021.07.14',
  'version.usable_until': None}
\ No newline at end of file