diff --git a/docs/simplesamlphp-install-repo.md b/docs/simplesamlphp-install-repo.md
index 0de258dcd6035fa6c826365f2abbf06bbf0e14d0..8c4548b6ba3f2cf8b0da551e2c1981a3a03c8d47 100644
--- a/docs/simplesamlphp-install-repo.md
+++ b/docs/simplesamlphp-install-repo.md
@@ -3,6 +3,12 @@ Installing SimpleSAMLphp from the repository
 
 These are some notes about running SimpleSAMLphp from the repository.
 
+Prerequisites
+-------------
+
+ * NodeJS version >= 10.0.
+
+
 Installing from git
 -------------------