diff --git a/Dockerfile b/Dockerfile
index a06eb0c24442bf064604a9c5b8c4388198151f32..005d11b69031a7507172a554a8c457a5eb322ca6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -75,7 +75,8 @@ RUN conda install -y python=${python_version} && \
       scikit-learn \
       six \
       theano \
-      mkdocs 
+      mkdocs \
+      numpy=1.18
 
 RUN git clone git://github.com/keras-team/keras.git /src && pip install -e /src[tests]
 RUN conda clean -yt