diff --git a/CHANGELOG.md b/CHANGELOG.md
index 061685d..507974b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.2.1] - 2020-02-01
+
+### Fixed
+
+- There is no `hostname` on Lambda.
+
+
 ## [1.2.0] - 2019-11-15
 
 ### Added
diff --git a/lib/is_it_working/handler.rb b/lib/is_it_working/handler.rb
index 269874a..e4b5848 100644
--- a/lib/is_it_working/handler.rb
+++ b/lib/is_it_working/handler.rb
@@ -32,7 +32,7 @@ class Handler
     def initialize(app=nil, route_path="/is_it_working", &block)
       @app = app
       @route_path = route_path
-      @hostname = `hostname`.chomp
+      @hostname = `hostname`.to_s.chomp
       @timers = []
       @filters = []
       @mutex = Mutex.new
diff --git a/lib/is_it_working/version.rb b/lib/is_it_working/version.rb
index a5b3603..2fb309f 100644
--- a/lib/is_it_working/version.rb
+++ b/lib/is_it_working/version.rb
@@ -1,3 +1,3 @@
 module IsItWorking
-  VERSION = '1.2.0'.freeze
+  VERSION = '1.2.1'.freeze
 end