diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
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--- a/DEVELOPMENT.md
+++ b/DEVELOPMENT.md
@@ -710,6 +710,8 @@ Add the three to four lines to you git config and this will do the necessary suc
 
 ## Best practices for writing groovy
 
+New steps should be written in go.
+
 ### Coding pattern
 
 Pipeline steps must not make use of return values. The pattern for sharing parameters between pipeline steps or between a pipeline step and a pipeline script is sharing values via the [`commonPipelineEnvironment`](../vars/commonPipelineEnvironment.groovy). Since there is no return value from a pipeline step the return value of a pipeline step is already `void` rather than `def`.