diff --git a/app/Dockerfile b/app/Dockerfile
index 411c289..a824ba7 100644
--- a/app/Dockerfile
+++ b/app/Dockerfile
@@ -28,6 +28,8 @@ ADD config.docker.php ${SCRIPT_ROOT}
 ENV OWNER_UID=1000
 ENV OWNER_GID=1000
 
+ENV TTRSS_SRC_REPO="https://git.tt-rss.org/fox/tt-rss.git"
+
 # TTRSS_XDEBUG_HOST defaults to host IP if unset
 ENV TTRSS_XDEBUG_ENABLED=""
 ENV TTRSS_XDEBUG_HOST=""
diff --git a/app/startup.sh b/app/startup.sh
index cef538a..8b93914 100755
--- a/app/startup.sh
+++ b/app/startup.sh
@@ -15,7 +15,7 @@ if ! id app >/dev/null 2>&1; then
 fi
 
 DST_DIR=/var/www/html/tt-rss
-SRC_REPO=https://git.tt-rss.org/fox/tt-rss.git
+SRC_REPO=${TTRSS_SRC_REPO}
 
 [ -e $DST_DIR ] && rm -f $DST_DIR/.app_is_ready