diff --git a/CHANGELOG.md b/CHANGELOG.md
index cf2e50f5..6f2ce688 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 3.5.1
+
+* Fix bug that can occur when useragent library version is older, resulting in a nil version sometimes.
+* Add constant for `strict-dynamic`
+
 ## 3.5.0
 
 This release adds support for setting two CSP headers (enforced/report-only) and management around them.
diff --git a/secure_headers.gemspec b/secure_headers.gemspec
index 2c09c8a8..063a65f5 100644
--- a/secure_headers.gemspec
+++ b/secure_headers.gemspec
@@ -1,7 +1,7 @@
 # -*- encoding: utf-8 -*-
 Gem::Specification.new do |gem|
   gem.name          = "secure_headers"
-  gem.version       = "3.5.0"
+  gem.version       = "3.5.1"
   gem.authors       = ["Neil Matatall"]
   gem.email         = ["neil.matatall@gmail.com"]
   gem.description   = 'Security related headers all in one gem.'