diff --git a/Dockerfile b/Dockerfile
index 81f0080..67e7b8a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,8 @@
 FROM alpine:latest
 
-ADD https://github.com/upx/upx/releases/download/v3.95/upx-3.95-amd64_linux.tar.xz /
-RUN apk add --update tar && tar xf upx-3.95-amd64_linux.tar.xz && \
-	mv upx-3.95-amd64_linux/upx /usr/local/bin
+RUN apk add --update wget tar && tar xf upx-3.95-amd64_linux.tar.xz && \
+  wget https://github.com/upx/upx/releases/download/v3.95/upx-3.95-amd64_linux.tar.xz && \
+  mv upx-3.95-amd64_linux/upx /usr/local/bin
 
 ENTRYPOINT ["upx"]