diff --git a/Makefile b/Makefile
index 565418a9a..ed7f8640c 100644
--- a/Makefile
+++ b/Makefile
@@ -49,7 +49,7 @@ DOCS_DIR            ?= docs
 # document validation options
 UNAME               != uname
 export KIND_URL     ?= https://kind.sigs.k8s.io/dl/v0.8.1/kind-$(UNAME)-amd64
-KUBECTL_VERSION     ?= v1.17.4
+KUBECTL_VERSION     ?= v1.18.6
 export KUBECTL_URL  ?= https://storage.googleapis.com/kubernetes-release/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl
 
 .PHONY: depend
diff --git a/tools/deployment/01_install_kubectl.sh b/tools/deployment/01_install_kubectl.sh
index ac707832e..8c5603b9c 100755
--- a/tools/deployment/01_install_kubectl.sh
+++ b/tools/deployment/01_install_kubectl.sh
@@ -14,7 +14,7 @@
 
 set -xe
 
-: ${KUBE_VERSION:="v1.17.4"}
+: ${KUBE_VERSION:="v1.18.6"}
 
 # Install kubectl
 URL="https://storage.googleapis.com"