diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index decd836..258178c 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - distro: centos-7
+          - distro: ubuntu-20.04
             platform: linux/amd64
           - distro: bionic
             platform: linux/amd64
@@ -57,7 +57,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - distro: centos-7
+          - distro: ubuntu-20.04
             platform: linux/amd64
           - distro: bionic
             platform: linux/amd64
@@ -93,7 +93,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - distro: centos-7
+          - distro: ubuntu-20.04
             platform: linux/amd64
           - distro: bionic
             platform: linux/amd64
diff --git a/Makefile b/Makefile
index e81fce3..96ee688 100644
--- a/Makefile
+++ b/Makefile
@@ -6,38 +6,38 @@ IMAGE_VERSION := ${RUST_VERSION}
 bionic/Dockerfile: gen-dockerfiles templates/bionic.Dockerfile
 	python3 gen-dockerfiles
 
-centos-7/Dockerfile: gen-dockerfiles templates/centos-7.Dockerfile
+ubuntu-20.04/Dockerfile: gen-dockerfiles templates/ubuntu-20.04.Dockerfile
 	python3 gen-dockerfiles
 
 aarch64/Dockerfile: gen-dockerfiles templates/aarch64.Dockerfile
 	python3 gen-dockerfiles
 
-build-all: build-bionic build-centos-7 build-aarch64
+build-all: build-bionic build-ubuntu-20.04 build-aarch64
 
 build-bionic: bionic/Dockerfile
 	docker build -f bionic/Dockerfile --tag ${DOCKERHUB_REPO}:bionic-${IMAGE_VERSION} .
 
-build-centos-7: centos-7/Dockerfile
-	docker build -f centos-7/Dockerfile --tag ${DOCKERHUB_REPO}:centos-7-${IMAGE_VERSION} .
+build-ubuntu-20.04: ubuntu-20.04/Dockerfile
+	docker build -f ubuntu-20.04/Dockerfile --tag ${DOCKERHUB_REPO}:ubuntu-20.04-${IMAGE_VERSION} .
 
 build-aarch64: aarch64/Dockerfile
 	docker build -f aarch64/Dockerfile --tag ${DOCKERHUB_REPO}:aarch64-${IMAGE_VERSION} .
 
-.PHONY: build-all build-bionic build-centos-7 build-aarch64
-push-all: push-bionic push-centos-7 push-aarch64
+.PHONY: build-all build-bionic build-ubuntu-20.04 build-aarch64
+push-all: push-bionic push-ubuntu-20.04 push-aarch64
 
 push-bionic: build-bionic
 	docker push ${DOCKERHUB_REPO}:bionic-${IMAGE_VERSION}
 
-push-centos-7: build-centos-7
-	docker push ${DOCKERHUB_REPO}:centos-7-${IMAGE_VERSION}
+push-ubuntu-20.04: build-ubuntu-20.04
+	docker push ${DOCKERHUB_REPO}:ubuntu-20.04-${IMAGE_VERSION}
 
 push-aarch64: build-aarch64
 	docker push ${DOCKERHUB_REPO}:aarch64-${IMAGE_VERSION}
 
-.PHONY: push-all push-bionic push-centos-7 push-aarch64
+.PHONY: push-all push-bionic push-ubuntu-20.04 push-aarch64
 
-test-all: test-bionic test-centos-7
+test-all: test-bionic test-ubuntu-20.04
 
 sync-ckb:
 	if [ -d ckb ]; then git -C ckb pull; else git clone --depth 1 https://github.com/nervosnetwork/ckb.git; fi
@@ -45,7 +45,7 @@ sync-ckb:
 test-bionic: sync-ckb
 	docker run --rm -it -w /ckb -v "$$(pwd)/ckb:/ckb" ${DOCKERHUB_REPO}:bionic-${IMAGE_VERSION} make prod
 
-test-centos-7: sync-ckb
-	docker run --rm -it -w /ckb -v "$$(pwd)/ckb:/ckb" ${DOCKERHUB_REPO}:centos-7-${IMAGE_VERSION} make prod
+test-ubuntu-20.04: sync-ckb
+	docker run --rm -it -w /ckb -v "$$(pwd)/ckb:/ckb" ${DOCKERHUB_REPO}:ubuntu-20.04-${IMAGE_VERSION} make prod
 
-.PHONY: test-all test-bionic test-centos-7 sync-ckb
+.PHONY: test-all test-bionic test-ubuntu-20.04 sync-ckb
diff --git a/centos-7/entrypoint.sh b/centos-7/entrypoint.sh
deleted file mode 100755
index 0ddf3a0..0000000
--- a/centos-7/entrypoint.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/bash
-
-scl enable devtoolset-8 llvm-toolset-7 "$*"
diff --git a/gen-dockerfiles b/gen-dockerfiles
index 287284a..15fa9c1 100755
--- a/gen-dockerfiles
+++ b/gen-dockerfiles
@@ -9,8 +9,8 @@ RUSTUP_VERSION   =  '1.27.1'
 DISTRIBUTIONS = {
     # Ubuntu
     'bionic': 'x86_64-unknown-linux-gnu',
-    # CentOS
-    'centos-7': 'x86_64-unknown-linux-gnu',
+    # Ubuntu
+    'ubuntu-20.04': 'x86_64-unknown-linux-gnu',
     # Arch64
     'aarch64': 'aarch64-unknown-linux-gnu',
 }
diff --git a/templates/centos-7.Dockerfile b/templates/ubuntu-20.04.Dockerfile
similarity index 53%
rename from templates/centos-7.Dockerfile
rename to templates/ubuntu-20.04.Dockerfile
index 4d331d3..68d3130 100644
--- a/templates/centos-7.Dockerfile
+++ b/templates/ubuntu-20.04.Dockerfile
@@ -1,18 +1,12 @@
-FROM centos:7
+FROM ubuntu:20.04
 
 ENV PATH=/root/.cargo/bin:$PATH
 
 RUN set -eux; \
-    sed -i 's/mirror.centos.org/vault.centos.org/g' /etc/yum.repos.d/CentOS-*.repo; \
-    sed -i 's/^#.*baseurl=http/baseurl=http/g' /etc/yum.repos.d/CentOS-*.repo; \
-    sed -i 's/^mirrorlist=http/#mirrorlist=http/g' /etc/yum.repos.d/CentOS-*.repo; \
-    yum install -y centos-release-scl; \
-    sed -i 's/mirror.centos.org/vault.centos.org/g' /etc/yum.repos.d/CentOS-*.repo; \
-    sed -i 's/^#.*baseurl=http/baseurl=http/g' /etc/yum.repos.d/CentOS-*.repo; \
-    sed -i 's/^mirrorlist=http/#mirrorlist=http/g' /etc/yum.repos.d/CentOS-*.repo; \
-    yum install -y git curl make devtoolset-8 llvm-toolset-7 perl-core pcre-devel wget zlib-devel; \
-    yum clean all; \
-    rm -rf /var/cache/yum
+    apt update; \
+    apt install -y git curl build-essential llvm perl libpcre3-dev wget zlib1g-dev; \
+    apt clean all; \
+    rm -rf /var/cache/apt
 
 ENV RUSTUP_HOME=/usr/local/rustup \
     CARGO_HOME=/usr/local/cargo \
@@ -40,7 +34,4 @@ RUN set -eux; \
 RUN git config --global --add safe.directory /ckb
 RUN git config --global --add safe.directory /ckb-cli
 
-COPY centos-7/entrypoint.sh /
-
-ENTRYPOINT ["/entrypoint.sh"]
 CMD ["bash"]
diff --git a/centos-7/Dockerfile b/ubuntu-20.04/Dockerfile
similarity index 54%
rename from centos-7/Dockerfile
rename to ubuntu-20.04/Dockerfile
index 6275afd..6ecb1e9 100644
--- a/centos-7/Dockerfile
+++ b/ubuntu-20.04/Dockerfile
@@ -1,18 +1,12 @@
-FROM centos:7
+FROM ubuntu:20.04
 
 ENV PATH=/root/.cargo/bin:$PATH
 
 RUN set -eux; \
-    sed -i 's/mirror.centos.org/vault.centos.org/g' /etc/yum.repos.d/CentOS-*.repo; \
-    sed -i 's/^#.*baseurl=http/baseurl=http/g' /etc/yum.repos.d/CentOS-*.repo; \
-    sed -i 's/^mirrorlist=http/#mirrorlist=http/g' /etc/yum.repos.d/CentOS-*.repo; \
-    yum install -y centos-release-scl; \
-    sed -i 's/mirror.centos.org/vault.centos.org/g' /etc/yum.repos.d/CentOS-*.repo; \
-    sed -i 's/^#.*baseurl=http/baseurl=http/g' /etc/yum.repos.d/CentOS-*.repo; \
-    sed -i 's/^mirrorlist=http/#mirrorlist=http/g' /etc/yum.repos.d/CentOS-*.repo; \
-    yum install -y git curl make devtoolset-8 llvm-toolset-7 perl-core pcre-devel wget zlib-devel; \
-    yum clean all; \
-    rm -rf /var/cache/yum
+    apt update; \
+    apt install -y git curl build-essential llvm perl libpcre3-dev wget zlib1g-dev; \
+    apt clean all; \
+    rm -rf /var/cache/apt
 
 ENV RUSTUP_HOME=/usr/local/rustup \
     CARGO_HOME=/usr/local/cargo \
@@ -40,7 +34,4 @@ RUN set -eux; \
 RUN git config --global --add safe.directory /ckb
 RUN git config --global --add safe.directory /ckb-cli
 
-COPY centos-7/entrypoint.sh /
-
-ENTRYPOINT ["/entrypoint.sh"]
 CMD ["bash"]