diff --git a/HISTORY.md b/HISTORY.md
index d375da9a..be41cb4d 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,3 +1,7 @@
+## 1.5.2 (January 24, 2016)
+
+- don't merge rulesets if between them a ruleset with same specificity (#264)
+
 ## 1.5.1 (January 14, 2016)
 
 - ensure `-` is not used as an identifier in attribute selectors (thanks to @mathiasbynens)
diff --git a/package.json b/package.json
index 213465fa..8371bbdb 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "csso",
   "description": "CSSO — CSS optimizer",
-  "version": "1.5.1",
+  "version": "1.5.2",
   "homepage": "https://github.com/css/csso",
   "author": "Sergey Kryzhanovsky <skryzhanovsky@ya.ru> (https://github.com/afelix)",
   "maintainers": [
diff --git a/test/fixture/compress/restructure.merge/7.css b/test/fixture/compress/restructure.merge/7.css
index 3506153a..56fd63ca 100644
--- a/test/fixture/compress/restructure.merge/7.css
+++ b/test/fixture/compress/restructure.merge/7.css
@@ -1,5 +1,5 @@
 /*
-  issue #264 don't merge rulesets if between there is a ruleset with same specificity
+  issue #264 don't merge rulesets if between them a ruleset with the same specificity
 */
 
 .notification-banner.drop {