diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 48acd15..540ad04 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,15 +1,17 @@
 
 ### Contributions / participation
 
-is always welcome.
+is always welcome!
 
-Note please that following is strongly requested:
+Note please the following:
 
-* One PR per feature or bug fix or improvement.
-* Document your PR properly, both in the PR and/or commit message and in the code.
-* Please test your changes thoroughly as reliability is important for this project.
-* Follow the length [coding guideline](https://github.com/drwetter/testssl.sh/wiki/Coding-Style). 
+* Please read at least the [coding convention](https://github.com/drwetter/testssl.sh/Coding_Convention.md).
+* One PR per feature or bug fix or improvement. Please do not mix issues.
+* Document your PR, both in the PR and/or commit message and in the code.
+* Please test your changes thoroughly as reliability is important for this project. You may want to check different servers with different settings.
+* Travis runs automatically when anything is committed/PR'd. You should check any complains from Travis. Beforehand you can check with `prove -v`.
+* If it's a new feature please consider writing a unit test for it.  You can use e.g. `t/20_baseline_ipv4_http.t` as a template. The general documentation for [Test::More](https://perldoc.perl.org/Test/More.html) is a good start.
+* If it's a new feature it would need to be documented in the appropriate section in `help()` and in `~/doc/testssl.1.md`
 
-
-If it's a new feature please consider writing a unit test for it. There's a directory ~/t/ which Travis runs automatically when anything is committed.  You can use e.g. `20_baseline_ipv4_http.t` as a template. There's also [general documentation for Test::More](https://perldoc.perl.org/Test/More.html).
+For questions just open an issue.