diff --git a/Dockerfile b/Dockerfile
index b8c5d10..9bb01c0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 FROM alpine:edge as base
-RUN ["apk", "add", "--no-cache", "--repository", "https://dl-cdn.alpinelinux.org/alpine/edge/testing", "streamlink"]
+RUN ["apk", "add", "--no-cache", "--repository", "https://dl-cdn.alpinelinux.org/alpine/edge/testing", "streamlink", "py3-tornado"]
 RUN ["mkdir", "/app"]
 COPY ["stream.py", "/app/stream.py"]