diff --git a/assets/wechat.jpg b/assets/wechat.jpg
index 64c4d8b27..ac4f9dc64 100644
Binary files a/assets/wechat.jpg and b/assets/wechat.jpg differ
diff --git a/docker/base/build_image.sh b/docker/base/build_image.sh
index 3c9af8c8e..83d6ca18d 100755
--- a/docker/base/build_image.sh
+++ b/docker/base/build_image.sh
@@ -36,7 +36,7 @@ while [[ $# -gt 0 ]]; do
         shift # past value
         ;;
         -i|--pip-index-url)
-        PIP_INDEX="$2"
+        PIP_INDEX_URL="$2"
         shift
         shift
         ;;