diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7f31b81..eaf63f2 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -8,4 +8,7 @@ There are just a few small guidelines you need to follow.
   license or Apache-2.0 license without any additional terms or conditions.
 - All submissions, including submissions by project members, require review.
   We use GitHub pull requests for this purpose.
-  Consult GitHub Help for more information on using pull requests.
\ No newline at end of file
+  Consult GitHub Help for more information on using pull requests.
+  
+We require all contributors to follow the [daac-tools Code of
+Conduct](https://github.com/daac-tools/guidelines/blob/main/conduct.md).