diff --git a/Dockerfile b/Dockerfile
index bc4f0c6d30c73d7eb75133f3c3a0b70ac50c76a4..ba75211cffb77590082d66c090fd2b1acea4385d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -74,7 +74,7 @@ RUN conda install -y python=${python_version} && \
       six \
       theano \
       mkdocs \
-      numpy=1.18
+      numpy
 
 RUN pip install keras