diff --git a/Dockerfile b/Dockerfile
index 7459bd0..b5d42b5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -38,8 +38,8 @@ RUN apt-get --quiet update && apt-get --quiet install -y \
 # magic-wormhole depends on these and pip wants to build them both from
 # source.
 RUN apt-get --quiet update && apt-get --quiet build-dep -y \
+    pyopenssl \
     python-nacl \
-    python-openssl \
 && rm -rf /var/lib/apt/lists/*
 
 # Create a virtualenv into which to install magicwormhole in to.