diff --git a/lib/PuppeteerSharp/CookieParam.cs b/lib/PuppeteerSharp/CookieParam.cs
index 45bfaed4a..a3739fab0 100644
--- a/lib/PuppeteerSharp/CookieParam.cs
+++ b/lib/PuppeteerSharp/CookieParam.cs
@@ -1,3 +1,6 @@
+using System.Text.Json.Serialization;
+using PuppeteerSharp.Helpers.Json;
+
 namespace PuppeteerSharp
 {
     /// <summary>
@@ -91,7 +94,9 @@ public class CookieParam
         /// <summary>
         /// Cookie partition key. The site of the top-level URL the browser was visiting at the
         /// start of the request to the endpoint that set the cookie. Supported only in Chrome.
+        /// TODO: a breaking change is needed to support other partition keys.
         /// </summary>
+        [JsonConverter(typeof(CookiePartitionKeyConverter))]
         public string PartitionKey { get; set; }
 
         /// <summary>
diff --git a/lib/PuppeteerSharp/Helpers/Json/CookiePartitionKeyConverter.cs b/lib/PuppeteerSharp/Helpers/Json/CookiePartitionKeyConverter.cs
new file mode 100644
index 000000000..5a4c2584a
--- /dev/null
+++ b/lib/PuppeteerSharp/Helpers/Json/CookiePartitionKeyConverter.cs
@@ -0,0 +1,41 @@
+#nullable enable
+
+using System;
+using System.Text.Json;
+using System.Text.Json.Nodes;
+using System.Text.Json.Serialization;
+
+namespace PuppeteerSharp.Helpers.Json
+{
+    internal sealed class CookiePartitionKeyConverter : JsonConverter<string>
+    {
+        /// <inheritdoc cref="JsonConverter"/>
+        public override bool CanConvert(Type objectType) => typeof(string).IsAssignableFrom(objectType);
+
+        /// <inheritdoc cref="JsonConverter"/>
+        public override string? Read(
+            ref Utf8JsonReader reader,
+            Type objectType,
+            JsonSerializerOptions options)
+        {
+            JsonNode? node = JsonNode.Parse(ref reader);
+
+            return node?["topLevelSite"]?.GetValue<string>() ?? null;
+        }
+
+        /// <inheritdoc cref="JsonConverter"/>
+        public override void Write(
+            Utf8JsonWriter writer,
+            string value,
+            JsonSerializerOptions options)
+        {
+            if (value != null && writer != null)
+            {
+                writer.WriteStartObject("partitionKey");
+                writer.WriteString("topLevelSite", value);
+                writer.WriteBoolean("hasCrossSiteAncestor", false);
+                writer.WriteEndObject();
+            }
+        }
+    }
+}
diff --git a/lib/PuppeteerSharp/PuppeteerSharp.csproj b/lib/PuppeteerSharp/PuppeteerSharp.csproj
index 15fe51990..1ce826f32 100644
--- a/lib/PuppeteerSharp/PuppeteerSharp.csproj
+++ b/lib/PuppeteerSharp/PuppeteerSharp.csproj
@@ -12,10 +12,10 @@
     <Description>Headless Browser .NET API</Description>
     <PackageId>PuppeteerSharp</PackageId>
     <PackageReleaseNotes></PackageReleaseNotes>
-    <PackageVersion>20.0.1-beta1</PackageVersion>
-    <ReleaseVersion>20.0.1</ReleaseVersion>
-    <AssemblyVersion>20.0.1</AssemblyVersion>
-    <FileVersion>20.0.1</FileVersion>
+    <PackageVersion>20.0.2</PackageVersion>
+    <ReleaseVersion>20.0.2</ReleaseVersion>
+    <AssemblyVersion>20.0.2</AssemblyVersion>
+    <FileVersion>20.0.2</FileVersion>
     <SynchReleaseVersion>false</SynchReleaseVersion>
     <StyleCopTreatErrorsAsWarnings>false</StyleCopTreatErrorsAsWarnings>
     <DebugType>embedded</DebugType>