diff --git a/Dockerfile b/Dockerfile
index 1afb4fc..5d27c55 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,7 +24,7 @@
 
 WORKDIR /build
 RUN wget https://github.com/apache/apisix-ingress-controller/archive/${INGRESS_VERSION}.tar.gz \
-    && tar zxvf apisix-ingress-controller-${INGRESS_VERSION}.tar.gz \
+    && tar zxvf ${INGRESS_VERSION}.tar.gz \
     && ln -s apisix-ingress-controller-${INGRESS_VERSION} controller \
     && cd ./controller \
     && GOPROXY=https://goproxy.io,direct make build
diff --git a/README.MD b/README.MD
index cea73a9..bc78f7a 100644
--- a/README.MD
+++ b/README.MD
@@ -4,7 +4,7 @@
 
 ```
 export INGRESS_VERSION=0.1.0
-$ docker build -t apisix-ingress-controller:${INGRESS_VERSION} --build-arg APISIX_VERSION=${APISIX_VERSION} .
+$ docker build -t apisix-ingress-controller:${INGRESS_VERSION} --build-arg INGRESS_VERSION=${INGRESS_VERSION} .
 ```
 
 ## How to deploy