diff --git a/conf/app.src b/conf/app.src
index f608932..49d722a 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,4 +1,4 @@
-SOURCE_URL=https://github.com/os-js/OS.js/archive/1380d4b98048dee2d7e95b9dddbf9af323f5fdab.zip
+SOURCE_URL=https://github.com/os-js/OS.js/archive/1380d4b98048dee2d7e95b9dddbf9af323f5fdab.tar.gz
 SOURCE_SUM=2cbfad95c59016a404bec35db0a4e7b6ebf4e6f782ee17745ca553fdbc23f1b4
 SOURCE_SUM_PRG=sha256sum
 ARCH_FORMAT=tar.gz