diff --git a/Dockerfile b/Dockerfile
index 3622db85b..cc042d2dd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -42,8 +42,7 @@ FROM golang:1.16-alpine AS build-env
 
 WORKDIR /go/src/tailscale
 
-COPY go.mod .
-COPY go.sum .
+COPY go.mod go.sum ./
 RUN go mod download
 
 COPY . .