diff --git a/Dockerfile b/Dockerfile
index 575d6cadbf69c08ec5e387a2b2a5cf4b15fa1abd..258aab3c736345fcb2580b0e21e49b3158db2c6e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -48,7 +48,7 @@ RUN wget --quiet https://repo.anaconda.com/miniconda/Miniconda3-4.7.12.1-Linux-x
 
 # Install Python packages and keras
 
-ARG python_version=3.7
+ARG python_version=3.6
 
 RUN conda config --append channels conda-forge
 RUN conda install -y python=${python_version} && \