diff --git a/.circleci/config.yml b/.circleci/config.yml
index 85f6f7cf..6fb11b32 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -80,6 +80,8 @@ jobs:
               if [[ $i == jruby* ]]; then
                 gem install jruby-openssl; # required by bundler, no effect on Ruby MRI
               fi
+              # bundler 2.0 may be preinstalled, we need to remove it if so
+              yes | gem uninstall bundler --version '>=2.0' || true;
               gem install bundler -v "~> 1.7";
               bundle install;
               mv Gemfile.lock "Gemfile.lock.$i"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6df6b42e..070a6b52 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 All notable changes to the LaunchDarkly Ruby SDK will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
 
+## [5.4.3] - 2019-01-11
+### Changed:
+- The SDK is now compatible with `net-http-persistent` 3.x. (Thanks, [CodingAnarchy](https://github.com/launchdarkly/ruby-client/pull/113)!)
+
 ## [5.4.2] - 2019-01-04
 ### Fixed:
 - Fixed overly specific dependency versions of `concurrent-ruby` and `semantic`. ([#115](https://github.com/launchdarkly/ruby-client/issues/115))
diff --git a/Gemfile.lock b/Gemfile.lock
index 6c4673e4..68212c17 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,13 +1,13 @@
 PATH
   remote: .
   specs:
-    ldclient-rb (5.4.1)
+    ldclient-rb (5.4.3)
       concurrent-ruby (~> 1.0)
       faraday (>= 0.9, < 2)
       faraday-http-cache (>= 1.3.0, < 3)
       http_tools (~> 0.4.5)
       json (>= 1.8, < 3)
-      net-http-persistent (~> 2.9)
+      net-http-persistent (>= 2.9, < 4.0)
       semantic (~> 1.6)
       socketry (~> 0.5.1)
 
@@ -36,7 +36,8 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     multipart-post (2.0.0)
-    net-http-persistent (2.9.4)
+    net-http-persistent (3.0.0)
+      connection_pool (~> 2.2)
     rake (10.5.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
diff --git a/ldclient-rb.gemspec b/ldclient-rb.gemspec
index 46dac190..4e96b6b4 100644
--- a/ldclient-rb.gemspec
+++ b/ldclient-rb.gemspec
@@ -35,7 +35,7 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency "faraday", [">= 0.9", "< 2"]
   spec.add_runtime_dependency "faraday-http-cache", [">= 1.3.0", "< 3"]
   spec.add_runtime_dependency "semantic", "~> 1.6"
-  spec.add_runtime_dependency "net-http-persistent", "~> 2.9"
+  spec.add_runtime_dependency "net-http-persistent", [">= 2.9", "< 4.0"]
   spec.add_runtime_dependency "concurrent-ruby", "~> 1.0"
   spec.add_runtime_dependency "http_tools", '~> 0.4.5'
   spec.add_runtime_dependency "socketry", "~> 0.5.1"
diff --git a/lib/ldclient-rb/version.rb b/lib/ldclient-rb/version.rb
index b09070dc..9e710855 100644
--- a/lib/ldclient-rb/version.rb
+++ b/lib/ldclient-rb/version.rb
@@ -1,3 +1,3 @@
 module LaunchDarkly
-  VERSION = "5.4.2"
+  VERSION = "5.4.3"
 end