diff --git a/Dockerfile b/Dockerfile
index dd3c5e3..3fd0beb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,5 +6,5 @@ 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/$KUBECTL_VERSION/bin/linux/amd64/kubectl -o /usr/bin/kubectl \
+RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl -o /usr/bin/kubectl \
 	&& chmod +x /usr/bin/kubectl \