diff --git a/Dockerfile b/Dockerfile
index 7dafd82..c763967 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
-FROM alpine:3.10
-RUN apk add --no-cache postgresql-client dcron tini
+FROM alpine:latest
+RUN apk add --no-cache postgresql-client dcron tini tzdata
 ENV PGHOST="db" \
     PGUSER="postgres" \
     PGDATABASE="postgres" \
diff --git a/README.md b/README.md
index 6b7c187..b0c8b6a 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,9 @@ The example above is for a `docker-compose.yml` file where you have to use `$$`
 Also note `%j` in the [date format](http://man7.org/linux/man-pages/man1/date.1.html) expression which means *day of year*.  
 So you will have backup files for a year until the first one is overwritten.  
 
-For a full example of using the `custom` format please have a look at [example.yml](./example.yml).  
+For a full example of using the `custom` format please have a look at [example.yml](./example.yml).
+
+To change the timezone, use the TZ environment, example: TZ=America/Sao_Paulo
 ## Restore
 `docker exec` into the container and use [`pg_restore`](https://www.postgresql.org/docs/current/app-pgrestore.html) or [`psql`](https://www.postgresql.org/docs/current/app-psql.html).