diff --git a/conf/app.src b/conf/app.src
index 4fe66b5..649cbe2 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,4 +1,4 @@
-SOURCE_URL=https://github.com/bookwyrm-social/bookwyrm/archive/refs/tags/v0.5.3
+SOURCE_URL=https://github.com/bookwyrm-social/bookwyrm/archive/refs/tags/v0.5.3.tar.gz
 SOURCE_SUM=41E263369BB3E0ED23AF6D6E112BD35EDE082BD5BECFE1BE9BBA152E47EE4E86
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz