diff --git a/.travis.yml b/.travis.yml
index c11e9f3..4f26e1f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,13 +4,19 @@ services:
 script:
   - docker run --rm -it -v "$(pwd)":/home/rust/src ekidd/rust-musl-builder sh -c 'sudo chown -R rust . && cargo test && cargo build --release'
 
+cache: cargo
+
+notifications:
+  email:
+    on_success: never
+
 before_deploy:
   - ./ci/before_deploy.sh
 
 deploy:
   provider: releases
   api_key:
-    secure: "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"
+    secure: "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"
   file_glob: true
   file:
     - deploy/*
diff --git a/README.md b/README.md
index 48ac4d9..862dfbf 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 # BIND9 API
 
+[![Travis Build Status](https://travis-ci.org/vbrandl/bind9-api.svg?branch=master)](https://travis-ci.org/vbrandl/bind9-api)
+[![License](https://img.shields.io/badge/license-MIT-green.svg)](https://github.com/vbrandl/bind9-api/blob/master/LICENSE-MIT)
+[![License](https://img.shields.io/badge/license-Apache-green.svg)](https://github.com/vbrandl/bind9-api/blob/master/LICENSE-APACHE)
+
 This is an attempt to implement an API to create, update or delete DNS records
 on a BIND9 DNS server.
 
@@ -108,6 +112,14 @@ In `letsencrypt/`, two example scripts can be found to use the client as a
 certbot hook for DNS challenges. It assumes that the client is located somewhere
 in `$PATH` and that the configurations file exists.
 
+To obtain a new certificate, certbot can be invoked as followed:
+
+```
+certbot certonly -n --agree-tos --server https://acme-v02.api.letsencrypt.org/directory --preferred-challenges=dns-01
+--manual --manual-auth-hook /usr/lib/letsencrypt-bind9/certbot-bind9-auth --manual-cleanup-hook
+/usr/lib/letsencrypt-bind9/certbot-bind9-cleanup --manual-public-ip-logging-ok -d example.com -d '*.example.com'
+```
+
 ## License
 
 This project is licensed under either of
@@ -117,4 +129,4 @@ This project is licensed under either of
  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
    http://opensource.org/licenses/MIT)
 
-at your option.
\ No newline at end of file
+at your option.
diff --git a/client/Cargo.toml b/client/Cargo.toml
index 075d487..6284927 100644
--- a/client/Cargo.toml
+++ b/client/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bind9-api-client"
-version = "0.1.0"
+version = "0.1.1"
 authors = ["Valentin Brandl <vbrandl@riseup.net>"]
 description = "Client for the BIND9 API"
 license = "MIT/Apache-2.0"
@@ -18,4 +18,4 @@ reqwest = "0.8.6"
 serde = "1.0.69"
 serde_derive = "1.0.69"
 serde_json = "1.0.22"
-toml = "0.4.6"
\ No newline at end of file
+toml = "0.4.6"
diff --git a/server/Cargo.toml b/server/Cargo.toml
index 6ed0047..4617734 100644
--- a/server/Cargo.toml
+++ b/server/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bind9-api"
-version = "0.1.0"
+version = "0.1.1"
 authors = ["Valentin Brandl <vbrandl@riseup.net>"]
 description = "Web API to create, update and remove DNS entries in bind9"
 license = "MIT/Apache-2.0"
@@ -15,4 +15,4 @@ futures = "0.1.21"
 log = "0.4.3"
 pretty_env_logger = "0.2.3"
 serde = "1.0.69"
-serde_json = "1.0.22"
\ No newline at end of file
+serde_json = "1.0.22"