diff --git a/Dockerfile b/Dockerfile
index 37988729..b46e407a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ ADD . /go/src/github.com/lifei6671/godoc
 
 WORKDIR /go/src/github.com/lifei6671/godoc
 
-RUN echo > logs/log.log
+RUN cat "" > logs/log.log
 RUN chmod +x start.sh
 
 RUN  go get -d ./... && \