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