diff --git a/README.md b/README.md
index 2d4a109..5359f83 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,6 @@ Framework-agnostic testing tool for [Kefir](https://kefirjs.github.io/kefir/).
 ## <a id="contents"></a> [≡](#contents) [Contents](#contents)
 
 * [Plugin helpers](#plugin-helpers)
-  * [`extensions: {[key: string]: Matcher}`](#extensions)
   * [`activate: (obs: Kefir.Observable) => void`](#activate)
   * [`deactivate: (obs: Kefir.Observable) => void`](#deactivate)
   * [`send: (obs: Kefir.Observable, values: Array<Event<T>>) => obs`](#send)
@@ -29,10 +28,6 @@ Framework-agnostic testing tool for [Kefir](https://kefirjs.github.io/kefir/).
 
 ### <a id="plugin-helpers"></a> [≡](#contents) [Plugin helpers](#plugin-helpers)
 
-#### <a id="extensions"></a> [≡](#contents) [`extensions: {[key: string]: Matcher}`](#extensions)
-
-The `extensions` object contains custom matchers for use with Jest. This object should be passed to Jest's `expect.extend`.
-
 #### <a id="activate"></a> [≡](#contents) [`activate: (obs: Kefir.Observable) => void`](#activate)
 
 `activate` is a simple helper function to turn a stream on.