diff --git a/conf/app.src b/conf/app.src
index 5fc840e..2d8b887 100755
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,5 +1,5 @@
 SOURCE_URL=https://code.castopod.org/adaures/castopod/uploads/d174ec288b04d4b3071ec89591ae185b/castopod-1.0.3.zip
-SOURCE_SUM=
+SOURCE_SUM=595c939104ce4c522a74a329c22773e2c4e40a90635b69147d3d5164c3345ec8
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=zip
 SOURCE_IN_SUBDIR=true