diff --git a/README.md b/README.md
index daefe8e9d..87c418ac3 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# elasticsearch.js 14.2.2
+# elasticsearch.js 15.0.0
 
 The official low-level Elasticsearch client for Node.js and the browser.
 
diff --git a/docs/browser_builds.asciidoc b/docs/browser_builds.asciidoc
index 068dd6cbb..a6dadf112 100644
--- a/docs/browser_builds.asciidoc
+++ b/docs/browser_builds.asciidoc
@@ -22,7 +22,7 @@ npm install elasticsearch-browser
 ---------
 
 === Download
- * v14.2.2: https://download.elasticsearch.org/elasticsearch/elasticsearch-js/elasticsearch-js-14.2.2.zip[zip], https://download.elasticsearch.org/elasticsearch/elasticsearch-js/elasticsearch-js-14.2.2.tar.gz[tar.gz]
+ * v15.0.0: https://download.elasticsearch.org/elasticsearch/elasticsearch-js/elasticsearch-js-15.0.0.zip[zip], https://download.elasticsearch.org/elasticsearch/elasticsearch-js/elasticsearch-js-15.0.0.tar.gz[tar.gz]
 
 === Angular Build
   * Registers an `esFactory` factory in the `"elasticsearch"` module
diff --git a/docs/changelog.asciidoc b/docs/changelog.asciidoc
index fa10af8a9..e3af7be69 100644
--- a/docs/changelog.asciidoc
+++ b/docs/changelog.asciidoc
@@ -1,6 +1,10 @@
 [[changelog]]
 == Changelog
 
+=== 15.0.0 (May 14 2018)
+  * Upgrade from lodash 2 to lodash 4 (Thanks https://github.com/dominykas[@dominykas]!) https://github.com/elastic/elasticsearch-js/pull/660[#600]
+    - Because this is such a large shift, and it could have potentially subtle effects on the module, we've done a major version bump. Unless you are using custom plugins that rely on the old `utils`, this _should_ be the equivalent of a patch upgrade.
+
 === 14.2.2 (Mar 29 2018)
   * Fix handling of `clearScroll`s `scrollId` parameter in the 5.2 API https://github.com/elastic/elasticsearch-js/issues/646[#646]
 
diff --git a/package.json b/package.json
index 96f67f1b1..70a809aab 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "description": "The official low-level Elasticsearch client for Node.js and the browser.",
   "main": "src/elasticsearch.js",
   "homepage": "http://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/index.html",
-  "version": "14.2.2",
+  "version": "15.0.0",
   "keywords": [
     "elasticsearch",
     "mapping",
@@ -123,4 +123,4 @@
   "engines": {
     "node": ">=0.8"
   }
-}
+}
\ No newline at end of file