diff --git a/dockerfile b/dockerfile
index 301dbf3..4b24ddd 100644
--- a/dockerfile
+++ b/dockerfile
@@ -1,12 +1,13 @@
 
-FROM alpine:3.7
+FROM alpine:3.11
 LABEL maintainer "me@jowj.net"
 
 RUN apk update
 
 RUN apk add \
-    python3 \ 
-    python-dev
+	python3 \ 
+	python-dev \
+	py-cryptography
 
 RUN python3 -m pip install --upgrade pip \
 	&& pip3 install requests \