diff --git a/README.md b/README.md
index 2a17db4..438455d 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ ajv implements full [JSON Schema draft 4](http://json-schema.org/) standard:
 - support of circular dependencies between schemas
 - correct string lengths for strings with unicode pairs (can be turned off)
 - formats defined by JSON Schema draft 4 standard and custom formats (can be turned off)
-- BETA: [custom keywords](https://github.com/epoberezkin/ajv/tree/v2.0#defining-custom-keywords) supported starting from version [2.0.0](https://github.com/epoberezkin/ajv/tree/v2.0), `npm install ajv@2.0.0-beta.0` to use it
+- BETA: [custom keywords](https://github.com/epoberezkin/ajv/tree/v2.0#defining-custom-keywords) supported starting from version [2.0.0](https://github.com/epoberezkin/ajv/tree/v2.0), `npm install ajv@^2.0.0-beta` to use it
 
 Currently ajv is the only validator that passes all the tests from [JSON Schema Test Suite](https://github.com/json-schema/JSON-Schema-Test-Suite) (according to [json-schema-benchmark](https://github.com/ebdrup/json-schema-benchmark), apart from the test that requires that `1.0` is not an integer that is impossible to satisfy in JavaScript).