diff --git a/logstash.gemspec b/logstash.gemspec
index 5ab5206c8..f7a93fe32 100644
--- a/logstash.gemspec
+++ b/logstash.gemspec
@@ -42,7 +42,7 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency "gelfd", ["0.2.0"]
   gem.add_runtime_dependency "gelf", ["1.3.2"]
   gem.add_runtime_dependency "gmetric", ["0.1.3"]
-  gem.add_runtime_dependency "jls-grok", ["0.10.9"]
+  gem.add_runtime_dependency "jls-grok", ["0.10.10"]
   gem.add_runtime_dependency "mail"
   gem.add_runtime_dependency "mongo"
   gem.add_runtime_dependency "onstomp"
diff --git a/spec/filters/grok.rb b/spec/filters/grok.rb
index 0afaf631e..37586287f 100644
--- a/spec/filters/grok.rb
+++ b/spec/filters/grok.rb
@@ -1,7 +1,7 @@
 require "test_utils"
 require "logstash/filters/grok"
 
-describe LogStash::Filters::Grok do
+describe LogStash::Filters::Grok do 
   extend LogStash::RSpec
 
   describe "simple syslog line" do
@@ -26,7 +26,7 @@ describe LogStash::Filters::Grok do
     end
   end
 
-  describe "parsing an event with multiple messages (array of strings)" do
+  describe "parsing an event with multiple messages (array of strings)" do 
     config <<-CONFIG
       filter {
         grok {
@@ -170,4 +170,37 @@ describe LogStash::Filters::Grok do
       insist { subject["foo"] } == "yo"
     end
   end
+
+  describe "using oniguruma named captures (?<name>regex)" do
+    context "plain regexp" do
+      config <<-'CONFIG'
+        filter {
+          grok {
+            singles => true
+            pattern => "(?<foo>\w+)"
+          }
+        }
+      CONFIG
+      sample "hello world" do
+        reject { subject.tags }.include?("_grokparsefailure")
+        insist { subject["foo"] } == "hello"
+      end
+    end
+
+    context "grok patterns" do
+      config <<-'CONFIG'
+        filter {
+          grok {
+            singles => true
+            pattern => "(?<timestamp>%{DATE_EU} %{TIME})"
+          }
+        }
+      CONFIG
+
+      sample "fancy 2012-12-12 12:12:12" do
+        reject { subject.tags }.include?("_grokparsefailure")
+        insist { subject["timestamp"] } == "2012-12-12 12:12:12"
+      end
+    end
+  end
 end