diff --git a/cosmo-bootstrap/Dockerfile b/cosmo-bootstrap/Dockerfile
index 24b8f4d..b5413ca 100644
--- a/cosmo-bootstrap/Dockerfile
+++ b/cosmo-bootstrap/Dockerfile
@@ -12,7 +12,7 @@ RUN --mount=type=cache,id=common,target=/media/common,sharing=locked \
  && acquire from=github repo=jart/cosmopolitan dest=/cosmopolitan env=COSMO \
 ;
 
-FROM alpine:3.16 AS builder
+FROM docker.io/library/alpine:3.16 AS builder
 ARG COSMO_FLAVOR COSMO_COMMIT
 COPY --from=downloader /cosmopolitan /cosmopolitan
 WORKDIR /cosmopolitan
diff --git a/cosmo-dist/Dockerfile b/cosmo-dist/Dockerfile
index 94b59e8..d926e25 100644
--- a/cosmo-dist/Dockerfile
+++ b/cosmo-dist/Dockerfile
@@ -49,7 +49,7 @@ RUN --mount=type=tmpfs,target=/tmp : \
  && cp /cosmopolitan/env /distrib/env \
 ;
 
-FROM alpine:3.16 AS runner
+FROM docker.io/library/alpine:3.16 AS runner
 COPY --from=distrib /distrib /cosmopolitan
 ENV PATH="/cosmopolitan/bin:/cosmopolitan/gcc/bin/:/cosmopolitan/gcc/x86_64-linux-musl/bin/:$PATH"
 # FIXME:
diff --git a/notwa-util/Dockerfile b/notwa-util/Dockerfile
index 4de20c4..b8043e4 100644
--- a/notwa-util/Dockerfile
+++ b/notwa-util/Dockerfile
@@ -1,6 +1,6 @@
 # MAIN: https://eaguru.guru/git/notwa/stargazing
 # REPO: https://eaguru.guru/git/notwa/stargazing
-FROM alpine:3.16 as partial
+FROM docker.io/library/alpine:3.16 as partial
 # need this for acquire (.tar.xz files):
 RUN apk add --no-cache xz
 COPY --chmod=0755 acquire cosmocc dedupe ofc quickconf shed \
@@ -23,7 +23,7 @@ RUN --mount=type=cache,id=common,target=/media/common,sharing=locked \
  && acquire \
 ;
 
-FROM alpine:3.16 as builder
+FROM docker.io/library/alpine:3.16 as builder
 RUN apk add --no-cache gcc linux-headers make musl-dev
 # configure and build a rescue shell and some utilities,
 # i.e. one better suited for images built "FROM scratch".