diff --git a/conf/app.src b/conf/app.src
index 5ed7eee..e539cd9 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,5 +1,5 @@
 SOURCE_URL=https://github.com/discourse/discourse/archive/v2.8.3.tar.gz
-SOURCE_SUM=a0e97e4a619d91aab95a4588abe8983960a533d68457821a8479413eeb841f79d
+SOURCE_SUM=0e97e4a619d91aab95a4588abe8983960a533d68457821a8479413eeb841f79d
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true