diff --git a/How-to-Contribute-Code.md b/How-to-Contribute-Code.md
index d9564fa..7d2eb13 100644
--- a/How-to-Contribute-Code.md
+++ b/How-to-Contribute-Code.md
@@ -2,6 +2,9 @@
 
 For general improvements/bug fixes just make a pull request. Try to make a single pull request for each change to make reviewing easier.
 
+## Broad Tips
+
+- avoid adding "sensitive" code, eg `eval(...)`, unless absolutely unavoidable
 
 ## Special Cases