diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e94529..69126ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Vault Ruby Changelog
 
+## Unreleased
+
+BUG FIXES
+
+- Removed explicit `connection_pool` runtime dependency to allow use of connection_pool 3.x for compatibility with sidekiq 8.1+. The gem is already managed as a transitive dependency by `net-http-persistent`, which supports connection_pool 2.2.4+ through 3.x. [GH-393]
+
 ## v0.20.0 (February 4, 2026)
 
 IMPROVEMENTS
diff --git a/vault.gemspec b/vault.gemspec
index 20830ac..115bf72 100644
--- a/vault.gemspec
+++ b/vault.gemspec
@@ -23,7 +23,6 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = ">= 3.1"
   spec.add_runtime_dependency "aws-sigv4"
   spec.add_runtime_dependency "base64"
-  spec.add_runtime_dependency "connection_pool",     "~> 2.4"
   spec.add_runtime_dependency "net-http-persistent", "~> 4.0", ">= 4.0.2"
 
 end