diff --git a/NEWS.md b/NEWS.md
index 2b04ce3..fc90b6a 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,12 @@
 # ChangeLog
 
+## v2.6.2
+
+### Fixes
+
+* Fix unbounded growth of stream state in timeout handling (#150)
+* docs: clarify timeout handling to prevent silent log loss
+
 ## v2.6.1
 
 ### Fixes
diff --git a/fluent-plugin-concat.gemspec b/fluent-plugin-concat.gemspec
index 32132fa..4919dc0 100644
--- a/fluent-plugin-concat.gemspec
+++ b/fluent-plugin-concat.gemspec
@@ -4,7 +4,7 @@ $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
 Gem::Specification.new do |spec|
   spec.name          = "fluent-plugin-concat"
-  spec.version       = "2.6.1"
+  spec.version       = "2.6.2"
   spec.authors       = ["Kenji Okimoto"]
   spec.email         = ["okimoto@clear-code.com"]