diff --git a/.oniro-ci/containers/docs-builder/Dockerfile b/.oniro-ci/containers/docs-builder/Dockerfile
index df6b43b8f4826d40fc1c6c028908bbd2cfa24394..006fd3d764f3283550bfc01682cf734cb0c00c0d 100644
--- a/.oniro-ci/containers/docs-builder/Dockerfile
+++ b/.oniro-ci/containers/docs-builder/Dockerfile
@@ -1,9 +1,9 @@
 # SPDX-FileCopyrightText: Huawei Inc.
 # SPDX-License-Identifier: Apache-2.0
 
-FROM ubuntu:21.10
+FROM ubuntu:20.04
 
-COPY --chown=root:root ppa/zyga-ubuntu-oh-tools-impish.list /etc/apt/sources.list.d/
+COPY --chown=root:root ppa/zyga-ubuntu-oh-tools-focal.list /etc/apt/sources.list.d/
 COPY --chown=root:root ppa/zyga-ubuntu-oh-tools.gpg /etc/apt/trusted.gpg.d/
 
 ARG DEBIAN_FRONTEND="noninteractive"
@@ -13,5 +13,5 @@ RUN apt-get update -qq \
       git-repo git git-lfs \
       python3-sphinx python3-sphinx-rtd-theme python3-recommonmark python3-sphinx-tabs \
       python3-sphinxcontrib.plantuml \
- && eatmydata apt-get install -qq -y 'ca-certificates=20210119ubuntu1' \
+ && eatmydata apt-get install -qq -y 'ca-certificates=20211016~20.04.1' \
  && eatmydata apt-get clean && rm -rf /var/lib/apt/lists/*
diff --git a/.oniro-ci/containers/docs-builder/ppa/zyga-ubuntu-oh-tools-focal.list b/.oniro-ci/containers/docs-builder/ppa/zyga-ubuntu-oh-tools-focal.list
new file mode 100644
index 0000000000000000000000000000000000000000..729b1c91794444b3e94ceab467f20b74e3d4ef74
--- /dev/null
+++ b/.oniro-ci/containers/docs-builder/ppa/zyga-ubuntu-oh-tools-focal.list
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: 2020 Huawei Inc.
+deb http://ppa.launchpad.net/zyga/oh-tools/ubuntu/ focal main
+# deb-src http://ppa.launchpad.net/zyga/oh-tools/ubuntu/ focal main
diff --git a/.oniro-ci/containers/docs-builder/ppa/zyga-ubuntu-oh-tools-impish.list b/.oniro-ci/containers/docs-builder/ppa/zyga-ubuntu-oh-tools-impish.list
deleted file mode 100644
index 4d86cf3791318e246925a84237e894da46fc81f6..0000000000000000000000000000000000000000
--- a/.oniro-ci/containers/docs-builder/ppa/zyga-ubuntu-oh-tools-impish.list
+++ /dev/null
@@ -1,4 +0,0 @@
-# SPDX-License-Identifier: Apache-2.0
-# SPDX-FileCopyrightText: 2020 Huawei Inc.
-deb http://ppa.launchpad.net/zyga/oh-tools/ubuntu/ impish main
-# deb-src http://ppa.launchpad.net/zyga/oh-tools/ubuntu/ impish main