diff --git a/installers/install_kubeadm_cluster.sh b/installers/install_kubeadm_cluster.sh
index 1672854..84a4872 100755
--- a/installers/install_kubeadm_cluster.sh
+++ b/installers/install_kubeadm_cluster.sh
@@ -58,7 +58,8 @@
     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
     CNI_DIR="$(mktemp -d -q --tmpdir "flannel.XXXXXX")"
     trap 'rm -rf "${CNI_DIR}"' EXIT
-    wget -q https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml -P $CNI_DIR
+    wget --retry-on-host-error --retry-on-http-error 404,429,503 --tries=5 https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml -P $CNI_DIR
+    [ ! -f $CNI_DIR/kube-flannel.yml ] && FATAL "Cannot Install Flannel because $CNI_DIR/kube-flannel.yml was not found. Maybe the file https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml is temporarily not accessible"
     kubectl apply -f $CNI_DIR
     [ $? -ne 0 ] && FATAL "Cannot Install Flannel"
     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function