diff --git a/worker/Dockerfile_scheduler b/worker/Dockerfile_scheduler
index b3fc704..bcff8d1 100644
--- a/worker/Dockerfile_scheduler
+++ b/worker/Dockerfile_scheduler
@@ -29,15 +29,14 @@ ENV CONDA_DIR=/opt/conda \
     LANGUAGE=en_US.UTF-8
 ENV PATH=$CONDA_DIR/bin:$PATH
 
-ENV MINICONDA_VERSION=4.8.3 \
-    MINICONDA_MD5=d63adf39f2c220950a063e0529d4ff74 \
-    CONDA_VERSION=4.8.3
+ENV MINICONDA_VERSION=4.7.12.1 \
+    MINICONDA_MD5=81c773ff87af5cfac79ab862942ab6b3
 
 WORKDIR /tmp
-RUN wget --quiet https://repo.continuum.io/miniconda/Miniconda3-py38_${MINICONDA_VERSION}-Linux-x86_64.sh && \
-    echo "${MINICONDA_MD5} *Miniconda3-py38_${MINICONDA_VERSION}-Linux-x86_64.sh" | md5sum -c - && \
-    /bin/bash Miniconda3-py38_${MINICONDA_VERSION}-Linux-x86_64.sh -f -b -p $CONDA_DIR && \
-    rm Miniconda3-py38_${MINICONDA_VERSION}-Linux-x86_64.sh && \
+RUN wget --quiet https://repo.continuum.io/miniconda/Miniconda3-${MINICONDA_VERSION}-Linux-x86_64.sh && \
+    echo "${MINICONDA_MD5} *Miniconda3-${MINICONDA_VERSION}-Linux-x86_64.sh" | md5sum -c - && \
+    /bin/bash Miniconda3-${MINICONDA_VERSION}-Linux-x86_64.sh -f -b -p $CONDA_DIR && \
+    rm Miniconda3-${MINICONDA_VERSION}-Linux-x86_64.sh && \
     conda config --system --prepend channels conda-forge && \
     conda config --system --set channel_priority strict && \
     conda update -n base --yes conda && \