diff --git a/Dockerfile b/Dockerfile
index 66ff967..6b1c35f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:latest
+FROM alpine:3.12
 # fetching cheat sheets
 ## installing dependencies
 RUN apk add --update --no-cache git py3-six py3-pygments py3-yaml py3-gevent \