diff --git a/02-Phoenix/gen/Dockerfile b/02-Phoenix/gen/Dockerfile
index 78c8333..03ff853 100644
--- a/02-Phoenix/gen/Dockerfile
+++ b/02-Phoenix/gen/Dockerfile
@@ -2,10 +2,12 @@ FROM microsoft/dotnet:1.1.0-sdk-projectjson
 
 WORKDIR /app
 
-ADD . .
+ADD project.json project.json
 
 RUN ["dotnet", "restore"]
 
+ADD . .
+
 RUN ["dotnet", "build", "-c", "Release"]
 
 EXPOSE 80/tcp