diff --git a/coffea-dask/Dockerfile.almalinux8 b/coffea-dask/Dockerfile.almalinux8
index 81254ab..022e020 100644
--- a/coffea-dask/Dockerfile.almalinux8
+++ b/coffea-dask/Dockerfile.almalinux8
@@ -8,10 +8,9 @@ ENV PYTHON_VERSION=${python}
 RUN yum -y install epel-release \
      && yum -y update \
      && yum -y install wget git bzip2 libgfortran which zsh emacs vim htop man man-pages \
-     && wget -O Miniforge3.sh "https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-$(uname)-$(uname -m).sh" \
-     && bash Miniforge3.sh -bfp /usr/local \
+     && curl -sSL https://github.com/conda-forge/miniforge/releases/download/23.3.1-1/Mambaforge-Linux-x86_64.sh -o /tmp/mambaforge.sh \
+     && bash /tmp/mambaforge.sh -bfp /usr/local \
      && rm -rf /tmp/mambaforge.sh \
-     #&& conda config --set solver classic \
      && mamba update mamba \
      && mamba clean --all --yes \
      && rpm -e --nodeps curl bzip2 \
diff --git a/coffea-dask/Dockerfile.almalinux9 b/coffea-dask/Dockerfile.almalinux9
index 71a889d..62be0e7 100644
--- a/coffea-dask/Dockerfile.almalinux9
+++ b/coffea-dask/Dockerfile.almalinux9
@@ -8,8 +8,8 @@ ENV PYTHON_VERSION=${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 \
+     && 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 \
      #&& conda config --set solver classic \
      && mamba update mamba \