diff --git a/CHANGELOG.md b/CHANGELOG.md
index ecf96bd..94470ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 4.3.0
+  - Update Nokogiri dependency version [#87](https://github.com/logstash-plugins/logstash-filter-xml/pull/87)
+
 ## 4.2.1
   - patch rexml to improve performance of multi-threaded xml parsing [#84](https://github.com/logstash-plugins/logstash-filter-xml/pull/84)
 
diff --git a/logstash-filter-xml.gemspec b/logstash-filter-xml.gemspec
index a0a16e4..c1b635d 100644
--- a/logstash-filter-xml.gemspec
+++ b/logstash-filter-xml.gemspec
@@ -1,7 +1,7 @@
 Gem::Specification.new do |s|
 
   s.name            = 'logstash-filter-xml'
-  s.version         = '4.2.1'
+  s.version         = '4.3.0'
   s.licenses        = ['Apache License (2.0)']
   s.summary         = "Parses XML into fields"
   s.description     = "This gem is a Logstash plugin required to be installed on top of the Logstash core pipeline using $LS_HOME/bin/logstash-plugin install gemname. This gem is not a stand-alone program"
@@ -20,9 +20,9 @@ Gem::Specification.new do |s|
   s.metadata = { "logstash_plugin" => "true", "logstash_group" => "filter" }
 
   # Gem dependencies
-  s.add_runtime_dependency 'logstash-core', '>= 8.4.0' # this provides Ruby 2.6.0
+  s.add_runtime_dependency 'logstash-core', '>= 8.15.3' # this provides Ruby 3.1
   s.add_runtime_dependency "logstash-core-plugin-api", ">= 1.60", "<= 2.99"
-  s.add_runtime_dependency 'nokogiri', '>= 1.13.8' # >= 1.13.0 requires Ruby 2.6+
+  s.add_runtime_dependency 'nokogiri', '>= 1.18.3' # >= 1.18.3 requires Ruby 3.1+
   s.add_runtime_dependency 'xml-simple'
 
   s.add_development_dependency 'logstash-devutils'