diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1339ce6d..6c0866bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,8 @@
   `go_to` instead
 
 ### Fixed
+- `InterceptedRequest#navigation_request?` and `AuthRequest#navigation_request?` always returned `nil`, they are true
+  for document requests now
 - `evaluate` raised `NoMethodError` when a node inside a `Map` or `Set` was also referenced elsewhere in the result
 - `headers.clear` kept sending the old headers until the next `add` or `set`, and kept the user agent and language they
   set. Now it clears them in Chrome right away
diff --git a/lib/ferrum/network/auth_request.rb b/lib/ferrum/network/auth_request.rb
index c5cb1fcf..a65e2568 100644
--- a/lib/ferrum/network/auth_request.rb
+++ b/lib/ferrum/network/auth_request.rb
@@ -26,7 +26,7 @@ def initialize(page, params)
       # @return [Boolean]
       #
       def navigation_request?
-        @params["isNavigationRequest"]
+        resource_type == "Document"
       end
 
       #
diff --git a/lib/ferrum/network/intercepted_request.rb b/lib/ferrum/network/intercepted_request.rb
index 16a675d6..d3e3fbef 100644
--- a/lib/ferrum/network/intercepted_request.rb
+++ b/lib/ferrum/network/intercepted_request.rb
@@ -45,7 +45,7 @@ def status?(value)
       # @return [Boolean]
       #
       def navigation_request?
-        @params["isNavigationRequest"]
+        resource_type == "Document"
       end
 
       #
diff --git a/sig/ferrum/network/intercepted_request.rbs b/sig/ferrum/network/intercepted_request.rbs
index b1857ded..73c70fc3 100644
--- a/sig/ferrum/network/intercepted_request.rbs
+++ b/sig/ferrum/network/intercepted_request.rbs
@@ -15,7 +15,7 @@ module Ferrum
 
       def status?: (untyped value) -> untyped
 
-      def navigation_request?: () -> untyped
+      def navigation_request?: () -> bool
 
       def match?: (untyped regexp) -> untyped
 
diff --git a/spec/network/auth_request_spec.rb b/spec/network/auth_request_spec.rb
index 8263fb80..4f56b73b 100644
--- a/spec/network/auth_request_spec.rb
+++ b/spec/network/auth_request_spec.rb
@@ -11,6 +11,20 @@
     }
   end
 
+  describe "#navigation_request?" do
+    it "returns true for a document request" do
+      request = described_class.new(nil, params.merge("resourceType" => "Document"))
+
+      expect(request.navigation_request?).to be(true)
+    end
+
+    it "returns false for a subresource request" do
+      request = described_class.new(nil, params.merge("resourceType" => "Script"))
+
+      expect(request.navigation_request?).to be(false)
+    end
+  end
+
   describe "#match?" do
     it "matches regular expressions" do
       expect(request.match?(/pattern\.svg\?\d/)).to be(true)
diff --git a/spec/network/intercepted_request_spec.rb b/spec/network/intercepted_request_spec.rb
index 38a3283d..06e38611 100644
--- a/spec/network/intercepted_request_spec.rb
+++ b/spec/network/intercepted_request_spec.rb
@@ -40,6 +40,20 @@
     end
   end
 
+  describe "#navigation_request?" do
+    it "returns true for a document request" do
+      request = described_class.new(nil, params.merge("resourceType" => "Document"))
+
+      expect(request.navigation_request?).to be(true)
+    end
+
+    it "returns false for a subresource request" do
+      request = described_class.new(nil, params.merge("resourceType" => "Script"))
+
+      expect(request.navigation_request?).to be(false)
+    end
+  end
+
   describe "#match?" do
     it "matches regular expressions" do
       expect(request.match?(/pattern\.svg\?\d/)).to be(true)