diff --git a/CHANGELOG.md b/CHANGELOG.md
index be3c78f8..fa1d5d1a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,9 @@ This product uses [Semantic Versioning](https://semver.org/).
 
 ## [Unreleased]
 
+## 2.1.1
+* Fixed HeartbeatTimer to add thread safety and fix crash reported in #188
+
 ## 2.1.0
 * Updated Presence.Options init method to be public
 * Updated URLSessionWebsocketTask init method to accept a custom configuration
diff --git a/SwiftPhoenixClient.podspec b/SwiftPhoenixClient.podspec
index 84026b86..a111ccee 100644
--- a/SwiftPhoenixClient.podspec
+++ b/SwiftPhoenixClient.podspec
@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = "SwiftPhoenixClient"
-  s.version          = "2.1.0"
+  s.version          = "2.1.1"
   s.summary          = "Connect your Phoenix and iOS applications through WebSockets!"
   s.swift_version    = "5.0"
   s.description  = <<-EOS