diff --git a/README.md b/README.md
index ef5d74d..48665ee 100644
--- a/README.md
+++ b/README.md
@@ -179,7 +179,7 @@ In this case RecaptchaMiddleware will just skip the request.
 
 Sometimes you may receive responses with status 422 (Unprocessable Entity).
 This means the scrapy-puppeteer-services struggled to find provided context or page in its memory.
-In such situations you can use this middleware to restore such contexts.
+In such situations you can use this middleware to restore these contexts.
 
 Enabling the middleware:
 ```Python
@@ -211,6 +211,9 @@ yield PuppeteerRequest(
 ...
 ```
 
+Also, you can see `dead_context` spider and try to enable `PuppeteerContextRestoreDownloaderMiddleware` in its `custom_settings`
+to see the working middleware.
+
 ## TODO
 
 - [x] skeleton that could handle goto, click, scroll, and actions
diff --git a/scrapypuppeteer/middlewares/restore.py b/scrapypuppeteer/middlewares/restore.py
index 13cc68b..ba841c3 100644
--- a/scrapypuppeteer/middlewares/restore.py
+++ b/scrapypuppeteer/middlewares/restore.py
@@ -21,7 +21,7 @@ class PuppeteerContextRestoreDownloaderMiddleware:
 
         The middleware uses additionally these meta-keys, do not use them, because their changing
     could possibly (almost probably) break determined behaviour:
-    `__request_binding`, `__restore_count`, `__context_id`.
+    `__request_binding`
 
         Settings: