diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 19806760..fc89ce0f 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -1,7 +1,7 @@
 **Requirements**
 
 - [ ] I have added test coverage for new or changed functionality
-- [ ] I have followed the repository's [pull request submission guidelines](../blob/master/CONTRIBUTING.md#submitting-pull-requests)
+- [ ] I have followed the repository's [pull request submission guidelines](../blob/main/CONTRIBUTING.md#submitting-pull-requests)
 - [ ] I have validated my changes against all supported platform versions
 
 **Related issues**
diff --git a/README.md b/README.md
index 17e3bfc5..87cbc5f1 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ LaunchDarkly Server-side SDK for Ruby
 
 [![Gem Version](https://badge.fury.io/rb/launchdarkly-server-sdk.svg)](http://badge.fury.io/rb/launchdarkly-server-sdk)
 
-[![Circle CI](https://circleci.com/gh/launchdarkly/ruby-server-sdk/tree/master.svg?style=svg)](https://circleci.com/gh/launchdarkly/ruby-server-sdk/tree/master)
+[![Circle CI](https://circleci.com/gh/launchdarkly/ruby-server-sdk/tree/main.svg?style=svg)](https://circleci.com/gh/launchdarkly/ruby-server-sdk/tree/main)
 [![RubyDoc](https://img.shields.io/static/v1?label=docs+-+all+versions&message=reference&color=00add8)](https://www.rubydoc.info/gems/launchdarkly-server-sdk)
 [![GitHub Pages](https://img.shields.io/static/v1?label=docs+-+latest&message=reference&color=00add8)](https://launchdarkly.github.io/ruby-server-sdk)
 
diff --git a/contract-tests/client_entity.rb b/contract-tests/client_entity.rb
index a9b7ccd5..699d8e72 100644
--- a/contract-tests/client_entity.rb
+++ b/contract-tests/client_entity.rb
@@ -23,7 +23,7 @@ def initialize(log, config)
       opts[:diagnostic_opt_out] = !events[:enableDiagnostics]
       opts[:all_attributes_private]  = !!events[:allAttributesPrivate]
       opts[:private_attribute_names] = events[:globalPrivateAttributes]
-      opts[:flush_interval] = (events[:flushIntervalMs] / 1_000) if events.has_key? :flushIntervalMs
+      opts[:flush_interval] = (events[:flushIntervalMs] / 1_000) if !events[:flushIntervalMs].nil?
       opts[:inline_users_in_events] =  events[:inlineUsers] || false
     else
       opts[:send_events] = false
diff --git a/launchdarkly-server-sdk.gemspec b/launchdarkly-server-sdk.gemspec
index bc4492a6..04262469 100644
--- a/launchdarkly-server-sdk.gemspec
+++ b/launchdarkly-server-sdk.gemspec
@@ -36,7 +36,7 @@ Gem::Specification.new do |spec|
 
   spec.add_runtime_dependency "semantic", "~> 1.6"
   spec.add_runtime_dependency "concurrent-ruby", "~> 1.1"
-  spec.add_runtime_dependency "ld-eventsource", "2.2.0"
+  spec.add_runtime_dependency "ld-eventsource", "2.2.1"
   # Please keep ld-eventsource dependency as an exact version so that bugfixes to
   # that LD library are always associated with a new SDK version.