diff --git a/.github/workflows/gh-ci.yaml b/.github/workflows/gh-ci.yaml
index 7e4d6d7..e6179da 100644
--- a/.github/workflows/gh-ci.yaml
+++ b/.github/workflows/gh-ci.yaml
@@ -24,11 +24,13 @@ jobs:
       fail-fast: false
       matrix:
         image_dir: [coffea-base, coffea-dask]
-        distro: [almalinux8]
+        distro: [almalinux8, almalinux9]
         python: ["3.9", "3.10", "3.11"]
         exclude:
           - distro: almalinux8
             python: 3.9
+          - distro: almalinux9
+            python: 3.9
           - image_dir: coffea-base
             python: 3.11
     name: ${{ matrix.image_dir }}-${{ matrix.distro }}-${{ matrix.python }}
diff --git a/coffea-base/Dockerfile.almalinux8 b/coffea-base/Dockerfile.almalinux8
index 0605531..f42143c 100644
--- a/coffea-base/Dockerfile.almalinux8
+++ b/coffea-base/Dockerfile.almalinux8
@@ -7,7 +7,7 @@ ENV PYTHON_VERSION=${python}
 
 RUN yum -y install epel-release \
      && yum -y update \
-     && yum -y install git curl bzip2 libgfortran which \
+     && yum -y install curl git bzip2 libgfortran which zsh emacs vim htop man man-pages \
      && 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 \
      && rm -rf /tmp/mambaforge.sh \
diff --git a/coffea-base/Dockerfile.almalinux9 b/coffea-base/Dockerfile.almalinux9
new file mode 100644
index 0000000..3577141
--- /dev/null
+++ b/coffea-base/Dockerfile.almalinux9
@@ -0,0 +1,28 @@
+FROM almalinux:9
+
+ARG python
+ARG releasev0
+
+ENV PYTHON_VERSION=${python}
+
+RUN yum -y install epel-release \
+     && yum -y update \
+     && yum -y --allowerasing install wget git bzip2 libgfortran which zsh emacs vim htop man man-pages \
+     && wget -O Miniforge3.sh "https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-$(uname)-$(uname -m).sh" \
+     && bash Miniforge3.sh -bfp /usr/local \
+     && rm -rf /tmp/mambaforge.sh \
+     && mamba update mamba \
+     && mamba clean --all --yes \
+     && yum clean all
+
+COPY environment.yaml /
+
+RUN mamba install --yes python=${PYTHON_VERSION} \
+     && mamba env update --file /environment.yaml \
+     && mamba clean -y --all
+
+# Make a symbolic link between installation /opt/conda/etc/grid-security and actual directory /etc/grid-security
+RUN ln -s /usr/local/etc/grid-security /etc/grid-security && \
+    curl -L https://github.com/opensciencegrid/osg-vo-config/archive/refs/heads/master.tar.gz | \
+    tar -xz --strip-components=1 --directory=/etc/grid-security --wildcards */vomses */vomsdir && \
+    mv /etc/grid-security/vomses /etc
diff --git a/coffea-dask/Dockerfile.almalinux9 b/coffea-dask/Dockerfile.almalinux9
new file mode 100644
index 0000000..6d9948c
--- /dev/null
+++ b/coffea-dask/Dockerfile.almalinux9
@@ -0,0 +1,28 @@
+FROM almalinux:9
+
+ARG python
+ARG release
+
+ENV PYTHON_VERSION=${python}
+
+RUN yum -y install epel-release \
+     && yum -y update \
+     && yum -y --allowerasing install wget git bzip2 libgfortran which zsh emacs vim htop man man-pages \
+     && wget -O Miniforge3.sh "https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-$(uname)-$(uname -m).sh" \
+     && bash Miniforge3.sh -bfp /usr/local \
+     && rm -rf /tmp/mambaforge.sh \
+     && mamba update mamba \
+     && mamba clean --all --yes \
+     && yum clean all
+
+COPY environment.yaml /
+
+RUN mamba install --yes python=${PYTHON_VERSION} \
+     && mamba env update --file /environment.yaml \
+     && mamba clean -y --all
+
+# Make a symbolic link between installation /opt/conda/etc/grid-security and actual directory /etc/grid-security
+RUN ln -s /usr/local/etc/grid-security /etc/grid-security && \
+    curl -L https://github.com/opensciencegrid/osg-vo-config/archive/refs/heads/master.tar.gz | \
+    tar -xz --strip-components=1 --directory=/etc/grid-security --wildcards */vomses */vomsdir && \
+    mv /etc/grid-security/vomses /etc