diff --git a/Dockerfile b/Dockerfile
index 3c83c57..45486f3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -26,6 +26,7 @@ ENV RFB_PORT=5900
 ENV TURBOVNC_PARAMS="-securitytypes none"
 ENV UMASK=000
 ENV CONNECTED_CONTAINERS=""
+ENV CONNECTED_CONTAINERS_TIMEOUT=15
 ENV UID=99
 ENV GID=100
 ENV DATA_PERM=770