Dockerfile in phi_attrs-0.1.4 vs Dockerfile in phi_attrs-0.2.0

@@ -1,5 +1,5 @@
-FROM ruby:2.5.1-alpine
+FROM ruby:2.5.3-alpine3.8
 MAINTAINER [e-mail]
 
 RUN apk add --no-cache --update \
     bash \
     alpine-sdk \