diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8d2c9a5..0b44d47 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 ### Fixed
 
 - `:ws_url` option is now used without modifications WYSIWYG.
+- `Network.requestWillBeSent` callback didn't handle params in a type-safe way
 
 ### Removed
 
diff --git a/lib/ferrum/network.rb b/lib/ferrum/network.rb
index 2ede0d4..6d8c2c3 100644
--- a/lib/ferrum/network.rb
+++ b/lib/ferrum/network.rb
@@ -368,26 +368,24 @@ def subscribe_request_will_be_sent
       @page.on("Network.requestWillBeSent") do |params|
         request = Network::Request.new(params)
 
-        # We can build exchange in two places, here on the event or when request
-        # is interrupted. So we have to be careful when to create new one. We
-        # create new exchange only if there's no with such id or there's but
-        # it's filled with request which means this one is new but has response
-        # for a redirect. So we assign response from the params to previous
-        # exchange and build new exchange to assign this request to it.
-        exchange = select(request.id).last
-        exchange = build_exchange(request.id) unless exchange&.blank?
-
         # On redirects Chrome doesn't change `requestId` and there's no
         # `Network.responseReceived` event for such request. If there's already
         # exchange object with this id then we got redirected and params has
         # `redirectResponse` key which contains the response.
-        if params["redirectResponse"]
-          previous_exchange = select(request.id)[-2]
+        if params["redirectResponse"] && (previous_exchange = select(request.id).last)
           response = Network::Response.new(@page, params)
           response.loaded = true
           previous_exchange.response = response
         end
 
+        # We can build exchange in two places, here on the event or when request
+        # is interrupted. So we have to be careful when to create new one. We
+        # create new exchange only if there's no with such id or there's but
+        # it's filled with request which means this one is new but has response
+        # for a redirect. So we assign response from the params to previous
+        # exchange and build new exchange to assign this request to it.
+        exchange = select(request.id).last
+        exchange = build_exchange(request.id) unless exchange&.blank?
         exchange.request = request
 
         @exchange = exchange if exchange.navigation_request?(@page.main_frame.id)