diff --git a/coffea-base/Dockerfile.almalinux8 b/coffea-base/Dockerfile.almalinux8
index 9c1f5c5..0605531 100644
--- a/coffea-base/Dockerfile.almalinux8
+++ b/coffea-base/Dockerfile.almalinux8
@@ -5,7 +5,8 @@ ARG releasev0
 
 ENV PYTHON_VERSION=${python}
 
-RUN yum -y update \
+RUN yum -y install epel-release \
+     && yum -y update \
      && yum -y install git curl bzip2 libgfortran which \
      && curl -sSL https://github.com/conda-forge/miniforge/releases/download/23.3.1-1/Mambaforge-Linux-x86_64.sh -o /tmp/mambaforge.sh \
      && bash /tmp/mambaforge.sh -bfp /usr/local \
diff --git a/coffea-dask/Dockerfile.almalinux8 b/coffea-dask/Dockerfile.almalinux8
index 3c8dadf..0ff4cc3 100644
--- a/coffea-dask/Dockerfile.almalinux8
+++ b/coffea-dask/Dockerfile.almalinux8
@@ -5,7 +5,8 @@ ARG release
 
 ENV PYTHON_VERSION=${python}
 
-RUN yum -y update \
+RUN yum -y install epel-release \
+     && yum -y update \
      && yum -y install git curl bzip2 libgfortran which zsh \
      && curl -sSL https://github.com/conda-forge/miniforge/releases/download/23.3.1-1/Mambaforge-Linux-x86_64.sh -o /tmp/mambaforge.sh \
      && bash /tmp/mambaforge.sh -bfp /usr/local \