diff --git a/Dockerfile b/Dockerfile
index 72f25dd..a7717fa 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:labs
-FROM ubuntu:rolling as preinstall
+FROM public.ecr.aws/ubuntu/ubuntu:focal as preinstall
 RUN apt-get update && apt-get install -y curl python3-minimal
 
 FROM preinstall as base
diff --git a/justfile b/justfile
index b65fd18..fab9425 100644
--- a/justfile
+++ b/justfile
@@ -4,7 +4,7 @@ DOCKER := if env_var_or_default("USE_PODMAN", "no") == "yes" { "podman" } else {
 BYPASS4NS := if env_var_or_default("USE_LIMA", "no") == "yes" { "--label nerdctl/bypass4ns=true" } else { "" }
 ARCH := if arch() == "aarch64" { "arm64" } else { "x64" }
 
-docker-build: docker-update
+docker-build:
     {{ DOCKER }} build --build-arg ARCH="{{ARCH}}" -t iosevka .
 
 docker-run: docker-build
@@ -14,6 +14,3 @@ clone:
     git clone http://github.com/be5invis/iosevka
 
 wormhole: docker-run
-
-docker-update:
-    {{ DOCKER }} pull ubuntu:rolling