Update Dockerfile

Dockerfile

@@ -14,7 +14,7 @@ RUN mkdir -p /tmp/matplotlib_config /tmp/cache/fontconfig && \
     chmod -R 777 /tmp/matplotlib_config /tmp/cache
 
 RUN pip install --upgrade pip setuptools wheel
-RUN pip install numpy==1.17.3 --only-binary=:all:
+RUN pip install numpy==1.19.3
 
 RUN pip install --no-cache-dir -r requirements.txt --upgrade