diff --git a/README.md b/README.md
index e99018c..d584d31 100644
--- a/README.md
+++ b/README.md
@@ -9,4 +9,7 @@ Put it in a folder your webserver can find.
 
 ## Development setup
 
+Make sure you have PHP installed, and the pdo-sqlite module.
+These can be obtained from your package manager.
+
 	./dev.sh