diff --git a/29/Dockerfile b/29/Dockerfile
index 601cfab87424e3f7268f9a451263b63f01868c79..e6d0b7a40ff361628a9f3b23e830d274997580c4 100644
--- a/29/Dockerfile
+++ b/29/Dockerfile
@@ -1,6 +1,6 @@
 FROM fedora:29
 
-RUN dnf update -y --setopt=install_weak_deps=False
+RUN dnf update -y --setopt=install_weak_deps=False # 20190502
 
 # TODO: Remove this once the build deps for boost have been cleaned up...
 RUN echo '%build_icinga_org 1' >/etc/rpm/macros.icinga_build