diff --git a/packaging/Dockerfile b/packaging/Dockerfile
index f3e845c..f4171be 100644
--- a/packaging/Dockerfile
+++ b/packaging/Dockerfile
@@ -4,7 +4,7 @@
 
 FROM ubuntu:impish
 
-RUN apt update && DEBIAN_FRONTEND=noninteractive apt install -y sudo tzdata
+RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y sudo tzdata
 COPY . eris
 RUN cd eris && ./install