diff --git a/build/docker/debian/Dockerfile b/build/docker/debian/Dockerfile
index b6cf4fb..a85d9e1 100644
--- a/build/docker/debian/Dockerfile
+++ b/build/docker/debian/Dockerfile
@@ -55,7 +55,7 @@
     && update-java-alternatives -s java-1.7.0-openjdk-amd64
 
 # Python dependencies
-RUN apt-get update && apt-get install -y \
+RUN apt-get update && apt-get install -y --no-install-recommends \
       python-all \
       python-all-dev \
       python-all-dbg \
@@ -64,6 +64,7 @@
       python-twisted \
       python-zope.interface \
       python-pip \
+      python3-dev \
       python3-pip
 
 # Ruby dependencies