diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..86f3608
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,3 @@
+Merge requests and issues are welcome.
+
+Merge requests must be targeted at issues, with each merge request including a line (or multiple) "Closes #<issue-number>" in it. If a merge request doesn't close an issue, consider raising an issue before submitting the MR.