diff --git a/amd64.dockerfile b/amd64.dockerfile
index 929e531..e18b10d 100644
--- a/amd64.dockerfile
+++ b/amd64.dockerfile
@@ -8,6 +8,7 @@ ENV videoFormat="bestvideo*+bestaudio/best"
 
 RUN \
 	echo "************ install packages ************" && \
+	apt-get update && \
 	apt-get install -y \
 		git \
 		wget \