diff --git a/Dockerfile b/Dockerfile
index a99505c..be586e3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM python:3.10-bullseye
 
 # Install required libraries
 RUN apt-get update
-RUN apt-get install -y wget gzip git libgsl-dev libcairo2-dev ; apt-get clean
+RUN apt-get install -y wget gzip git libgsl-dev libcairo2-dev python3-numpy; apt-get clean
 
 # Install ephemeris software
 WORKDIR /