diff --git a/Dockerfile b/Dockerfile
index d0184d26..04c08d2c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM python:3.6-slim-stretch as build
 
 # Setup build dependencies
 RUN apt update
-RUN apt install -y python-dev gcc libsqlite3-mod-spatialite
+RUN apt install -y python3-dev gcc libsqlite3-mod-spatialite
 # Add local code to the image instead of fetching from pypi.
 ADD . /datasette