diff --git a/Dockerfile b/Dockerfile
index 3fd0beb..bd5de1b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ FROM $BASE_IMAGE
 RUN apk add -U --no-cache openssl
 
 # download and install kubectl
-ARG KUBECTL_VERSION=v9.0.10
-
-RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl -o /usr/bin/kubectl \
+ARG KUBECTL_VERSION
+ENV KUBECTL_VERSION ${CONT_IMG_VER:-v9.0.10}
+RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/$KUBECTL_VERSION/bin/linux/amd64/kubectl -o /usr/bin/kubectl \
 	&& chmod +x /usr/bin/kubectl \