diff --git a/.travis.yml b/.travis.yml
index fb0e1a4..4e2cd7e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,9 @@
 language: ruby
 rvm:
-  - 2.2.0
-  - 2.3.1
+  - 2.2.6
+  - 2.3.7
+  - 2.4.4
+  - 2.5.1
 services:
   - memcached
   - redis-server
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 31b39e4..8cf2eac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## 0.3.3
 
 - Default TTL for keys to allow for short-lived locking keys (thanks to Ian Remillard) without leaking memory.
+- Vastly improve initial lock acquisition, especially on Redis (thanks to Jeremy Wadscak).
 
 ## 0.3.2
 
diff --git a/suo.gemspec b/suo.gemspec
index 8be49a1..a2352d0 100644
--- a/suo.gemspec
+++ b/suo.gemspec
@@ -16,7 +16,6 @@ Gem::Specification.new do |spec|
 
   spec.files         = `git ls-files -z`.split("\x0")
   spec.bindir        = "bin"
-  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]