diff --git a/Dockerfile b/Dockerfile
index de9e29f..21f5a19 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ LABEL maintainer="sma11black <smallblack@outlook.com>"
 COPY entrypoint.sh /entrypoint.sh
 COPY sync_deploy_history.js /sync_deploy_history.js
 
-RUN apt-get update && \
+RUN apt-get update > /dev/null && \
     apt-get install -y git openssh-client > /dev/null ; \
     chmod +x /entrypoint.sh
 
diff --git a/entrypoint.sh b/entrypoint.sh
index a338c13..1e958fd 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -20,7 +20,7 @@ npm install hexo-deployer-git --save
 NODE_PATH=$NODE_PATH:$(pwd)/node_modules node /sync_deploy_history.js
 
 # deployment
-if [ "$INPUT_COMMIT_MSG" == "" ]
+if [ "$INPUT_COMMIT_MSG" = "" ]
 then
     hexo g -d
 else