diff --git a/.github/workflows/sifi_erl.yaml b/.github/workflows/sifi_erl.yaml
index faa14f1..2ce049b 100644
--- a/.github/workflows/sifi_erl.yaml
+++ b/.github/workflows/sifi_erl.yaml
@@ -14,6 +14,9 @@ jobs:
           - { DISTRO: "rockylinux", OS_VERSION: "8", PLATFORM: "linux-arm64", RUNNER: "ubuntu-22.04-arm64", ERLANG_VERSION: "26.1.2"}
           - { DISTRO: "rockylinux", OS_VERSION: "8", PLATFORM: "linux-arm64", RUNNER: "ubuntu-22.04-arm64", ERLANG_VERSION: "25.3.2"}
           - { DISTRO: "rockylinux", OS_VERSION: "8", PLATFORM: "linux-arm64", RUNNER: "ubuntu-22.04-arm64", ERLANG_VERSION: "24.3.4"}
+          - { DISTRO: "centos", OS_VERSION: "7", PLATFORM: "linux-arm64", RUNNER: "ubuntu-22.04-arm64", ERLANG_VERSION: "26.1.2"}
+          - { DISTRO: "centos", OS_VERSION: "7", PLATFORM: "linux-arm64", RUNNER: "ubuntu-22.04-arm64", ERLANG_VERSION: "25.3.2"}
+          - { DISTRO: "centos", OS_VERSION: "7", PLATFORM: "linux-arm64", RUNNER: "ubuntu-22.04-arm64", ERLANG_VERSION: "24.3.4"}
     runs-on: ${{ matrix.cfg.RUNNER }}
     steps:
       - name: Checkout
diff --git a/builders/elixir_centos.Dockerfile b/builders/elixir_centos.Dockerfile
index b2708a8..4f9fa44 100644
--- a/builders/elixir_centos.Dockerfile
+++ b/builders/elixir_centos.Dockerfile
@@ -6,6 +6,15 @@ ARG os
 ARG os_version
 ADD yumdnf /usr/local/bin/
 
+# Fix centos 7 mirrors
+RUN --mount=type=cache,id=${os}_${os_version},target=/var/cache/dnf,sharing=private \
+  --mount=type=cache,id=${os}_${os_version},target=/var/cache/yum,sharing=private \
+  if [ "${os}:${os_version}" = "centos:7" ]; then \
+    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; \
+  fi
+
 # Fix centos 8 mirrors
 RUN --mount=type=cache,id=${os}_${os_version},target=/var/cache/dnf,sharing=private \
   --mount=type=cache,id=${os}_${os_version},target=/var/cache/yum,sharing=private \