diff --git a/core/flex/sources b/core/flex/sources
index c10fca72..13416697 100644
--- a/core/flex/sources
+++ b/core/flex/sources
@@ -1 +1 @@
-https://github.com/westes/flex/releases/download/v2.6.4/flex-2.6.4.tar.gz
+https://github.com/westes/flex/releases/download/vVERSION/flex-VERSION.tar.gz