diff --git a/CHANGELOG.md b/CHANGELOG.md
index 12b6f76..22fb1ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.11.1] - 2025-01-31
+### Added
+- Derived type declarations on `SuggestionBase`
+
 ## [2.11.0] - 2025-01-10
 ### Added
 - Context.MessageId on RichMessages supporting WhatsApp for referencing a previous message
diff --git a/CM.Text.Tests/SuggestionsTests.cs b/CM.Text.Tests/SuggestionsTests.cs
new file mode 100644
index 0000000..a22c3ea
--- /dev/null
+++ b/CM.Text.Tests/SuggestionsTests.cs
@@ -0,0 +1,123 @@
+using System.Text.Json;
+using CM.Text.BusinessMessaging.Model.MultiChannel;
+using FluentAssertions;
+
+namespace CM.Text.Tests
+{
+    [TestClass]
+    public class SuggestionsTests
+    {
+        [TestMethod]
+        public void SerializationCalendarSuggestionTest()
+        {
+            var calenderSuggestion = new CalendarSuggestion()
+            {
+                Calendar = new CalendarOptions()
+                {
+                    Title = "Appointment selection",
+                    Description = "Schedule an appointment with us",
+                    EndTime = DateTime.UtcNow,
+                    StartTime = DateTime.UtcNow,
+                }
+            };
+            
+            var serialized= JsonSerializer.Serialize<SuggestionBase>(calenderSuggestion);
+
+            serialized.Should().NotBeNullOrWhiteSpace();
+            
+            var deserialized = JsonSerializer.Deserialize<SuggestionBase>(serialized);
+
+            deserialized.Should().BeOfType<CalendarSuggestion>();
+            var deserializedCalendarSuggestion = deserialized as CalendarSuggestion;
+            deserializedCalendarSuggestion.Should().BeEquivalentTo(calenderSuggestion);
+        }
+        
+        [TestMethod]
+        public void SerializationDialSuggestionTest()
+        {
+            var dialSuggestion = new DialSuggestion()
+            {
+                Dial = new Dial()
+                {
+                    PhoneNumber = "0031612345678"
+                }
+            };
+            
+            var serialized= JsonSerializer.Serialize<SuggestionBase>(dialSuggestion);
+
+            serialized.Should().NotBeNullOrWhiteSpace();
+            
+            var deserialized = JsonSerializer.Deserialize<SuggestionBase>(serialized);
+
+            deserialized.Should().BeOfType<DialSuggestion>();
+            var deserializedDialSuggestion = deserialized as DialSuggestion;
+            deserializedDialSuggestion.Should().BeEquivalentTo(dialSuggestion);
+        }
+        
+        [TestMethod]
+        public void SerializationOpenUrlSuggestionTest()
+        {
+            var openUrlSuggestion = new OpenUrlSuggestion()
+            {
+                Url = "https://www.cm.com"
+            };
+            
+            var serialized= JsonSerializer.Serialize<SuggestionBase>(openUrlSuggestion);
+
+            serialized.Should().NotBeNullOrWhiteSpace();
+            
+            var deserialized = JsonSerializer.Deserialize<SuggestionBase>(serialized);
+
+            deserialized.Should().BeOfType<OpenUrlSuggestion>();
+            var deserializedOpenUrlSuggestion = deserialized as OpenUrlSuggestion;
+            deserializedOpenUrlSuggestion.Should().BeEquivalentTo(openUrlSuggestion);
+        }
+        
+        [TestMethod]
+        public void SerializationViewLocationSuggestionTest()
+        {
+            var viewLocationSuggestion = new ViewLocationSuggestion()
+            {
+                Location = new ViewLocationOptions()
+                {
+                    Label = "CM.com headquarters",
+                    Latitude = "51.602885",
+                    Longitude = "4.7683932",
+                    SearchQuery = "CM.com headquarters",
+                    Radius = 5
+                }
+            };
+            
+            var serialized= JsonSerializer.Serialize<SuggestionBase>(viewLocationSuggestion);
+
+            serialized.Should().NotBeNullOrWhiteSpace();
+            
+            var deserialized = JsonSerializer.Deserialize<SuggestionBase>(serialized);
+
+            deserialized.Should().BeOfType<ViewLocationSuggestion>();
+            var deserializedViewLocationSuggestion = deserialized as ViewLocationSuggestion;
+            deserializedViewLocationSuggestion.Should().BeEquivalentTo(viewLocationSuggestion);
+        }
+        
+        [TestMethod]
+        public void SerializationReplySuggestionTest()
+        {
+            var replySuggestion = new ReplySuggestion()
+            {
+                Label = "Some label",
+                PostbackData = "LABEL",
+                Description = "Description of the label",
+                Media = new MediaContent("Test image", "https://example.com", "image/jpg")
+            };
+            var serialized= JsonSerializer.Serialize<SuggestionBase>(replySuggestion);
+
+            serialized.Should().NotBeNullOrWhiteSpace();
+            
+            var deserialized = JsonSerializer.Deserialize<SuggestionBase>(serialized);
+
+            deserialized.Should().BeOfType<ReplySuggestion>();
+            var deserializedReplySuggestion = deserialized as ReplySuggestion;
+            deserializedReplySuggestion.Should().BeEquivalentTo(replySuggestion);
+        }
+    }
+}
diff --git a/CM.Text/BusinessMessaging/Model/MultiChannel/CalendarOptions.cs b/CM.Text/BusinessMessaging/Model/MultiChannel/CalendarOptions.cs
index 0e7744f..7122d14 100644
--- a/CM.Text/BusinessMessaging/Model/MultiChannel/CalendarOptions.cs
+++ b/CM.Text/BusinessMessaging/Model/MultiChannel/CalendarOptions.cs
@@ -13,12 +13,14 @@ public class CalendarOptions
         /// <summary>
         ///     The end of the appointment.
         /// </summary>
-        [JsonPropertyName("endTime")] public DateTime EndTime;
+        [JsonPropertyName("endTime")]
+        public DateTime EndTime { get; set; }
 
         /// <summary>
         ///     The start of the appointment.
         /// </summary>
-        [JsonPropertyName("startTime")] public DateTime StartTime;
+        [JsonPropertyName("startTime")]
+        public DateTime StartTime { get; set; }
 
         /// <summary>
         ///     The description which will appear in the calendar app
diff --git a/CM.Text/BusinessMessaging/Model/MultiChannel/CalendarSuggestion.cs b/CM.Text/BusinessMessaging/Model/MultiChannel/CalendarSuggestion.cs
index c8768b2..2a52e55 100644
--- a/CM.Text/BusinessMessaging/Model/MultiChannel/CalendarSuggestion.cs
+++ b/CM.Text/BusinessMessaging/Model/MultiChannel/CalendarSuggestion.cs
@@ -11,12 +11,6 @@ namespace CM.Text.BusinessMessaging.Model.MultiChannel
     [PublicAPI]
     public class CalendarSuggestion : SuggestionBase
     {
-        /// <summary>
-        ///     The action of this suggestion
-        /// </summary>
-        [JsonPropertyName("action")]
-        public override string Action => "CreateCalendarEvent";
-
         /// <summary>
         ///     The options of the agenda item
         /// </summary>
diff --git a/CM.Text/BusinessMessaging/Model/MultiChannel/DialSuggestion.cs b/CM.Text/BusinessMessaging/Model/MultiChannel/DialSuggestion.cs
index 2508ae3..13c6894 100644
--- a/CM.Text/BusinessMessaging/Model/MultiChannel/DialSuggestion.cs
+++ b/CM.Text/BusinessMessaging/Model/MultiChannel/DialSuggestion.cs
@@ -11,12 +11,6 @@ namespace CM.Text.BusinessMessaging.Model.MultiChannel
     [PublicAPI]
     public class DialSuggestion : SuggestionBase
     {
-        /// <summary>
-        ///     The action of this suggestion
-        /// </summary>
-        [JsonPropertyName("action")]
-        public override string Action => "Dial";
-
         /// <summary>
         ///     The dial options
         /// </summary>
diff --git a/CM.Text/BusinessMessaging/Model/MultiChannel/OpenUrlSuggestion.cs b/CM.Text/BusinessMessaging/Model/MultiChannel/OpenUrlSuggestion.cs
index 267dd0a..66faff6 100644
--- a/CM.Text/BusinessMessaging/Model/MultiChannel/OpenUrlSuggestion.cs
+++ b/CM.Text/BusinessMessaging/Model/MultiChannel/OpenUrlSuggestion.cs
@@ -13,12 +13,6 @@ namespace CM.Text.BusinessMessaging.Model.MultiChannel
     [PublicAPI]
     public class OpenUrlSuggestion : SuggestionBase
     {
-        /// <summary>
-        ///     The action of this suggestion
-        /// </summary>
-        [JsonPropertyName("action")]
-        public override string Action => "openUrl";
-
         /// <summary>
         ///     The url the end user can open
         /// </summary>
diff --git a/CM.Text/BusinessMessaging/Model/MultiChannel/ReplySuggestion.cs b/CM.Text/BusinessMessaging/Model/MultiChannel/ReplySuggestion.cs
index d101b5f..2a1946e 100644
--- a/CM.Text/BusinessMessaging/Model/MultiChannel/ReplySuggestion.cs
+++ b/CM.Text/BusinessMessaging/Model/MultiChannel/ReplySuggestion.cs
@@ -9,12 +9,6 @@ namespace CM.Text.BusinessMessaging.Model.MultiChannel
     [PublicAPI]
     public class ReplySuggestion : SuggestionBase
     {
-        /// <summary>
-        ///     The action of this suggestion
-        /// </summary>
-        [JsonPropertyName("action")]
-        public override string Action => "reply";
-
         /// <summary>
         ///     Description of the Reply suggestion
         /// </summary>
diff --git a/CM.Text/BusinessMessaging/Model/MultiChannel/SuggestionBase.cs b/CM.Text/BusinessMessaging/Model/MultiChannel/SuggestionBase.cs
index 865d015..df675ec 100644
--- a/CM.Text/BusinessMessaging/Model/MultiChannel/SuggestionBase.cs
+++ b/CM.Text/BusinessMessaging/Model/MultiChannel/SuggestionBase.cs
@@ -6,16 +6,18 @@ namespace CM.Text.BusinessMessaging.Model.MultiChannel
     /// <summary>
     ///     Suggestions can be used in several channels, not all channels
     ///     support all suggestions.
+    ///
+    ///     Requires a json derived type for serialization to work
     /// </summary>
     [PublicAPI]
+    [JsonPolymorphic(TypeDiscriminatorPropertyName = "action")]
+    [JsonDerivedType(typeof(CalendarSuggestion), "CreateCalendarEvent")]
+    [JsonDerivedType(typeof(DialSuggestion), "Dial")]
+    [JsonDerivedType(typeof(OpenUrlSuggestion), "openUrl")]
+    [JsonDerivedType(typeof(ReplySuggestion), "reply")]
+    [JsonDerivedType(typeof(ViewLocationSuggestion), "viewLocation")]
     public abstract class SuggestionBase
     {
-        /// <summary>
-        ///     The action of this suggestion
-        /// </summary>
-        [JsonPropertyName("action")]
-        public virtual string Action { get; }
-
         /// <summary>
         ///     The text the end user will see
         /// </summary>
diff --git a/CM.Text/BusinessMessaging/Model/MultiChannel/ViewLocationSuggestion.cs b/CM.Text/BusinessMessaging/Model/MultiChannel/ViewLocationSuggestion.cs
index df20cf5..e9d988d 100644
--- a/CM.Text/BusinessMessaging/Model/MultiChannel/ViewLocationSuggestion.cs
+++ b/CM.Text/BusinessMessaging/Model/MultiChannel/ViewLocationSuggestion.cs
@@ -9,12 +9,6 @@ namespace CM.Text.BusinessMessaging.Model.MultiChannel
     [PublicAPI]
     public class ViewLocationSuggestion : SuggestionBase
     {
-        /// <summary>
-        ///     The action of this suggestion
-        /// </summary>
-        [JsonPropertyName("action")]
-        public override string Action => "viewLocation";
-
         /// <summary>
         ///     The location options
         /// </summary>
diff --git a/CM.Text/CM.Text.csproj b/CM.Text/CM.Text.csproj
index f8d9970..a96c07e 100644
--- a/CM.Text/CM.Text.csproj
+++ b/CM.Text/CM.Text.csproj
@@ -13,12 +13,12 @@
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <PackageIcon>icon.png</PackageIcon>
     <PackageReleaseNotes>$([System.IO.File]::ReadAllText("$(MSBuildProjectDirectory)/../CHANGELOG.md"))</PackageReleaseNotes>
-    <Version>2.11.0</Version>
+    <Version>2.11.1</Version>
     <PackageProjectUrl>https://github.com/cmdotcom/text-sdk-dotnet</PackageProjectUrl>
     <NeutralLanguage>en</NeutralLanguage>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
-    <AssemblyVersion>2.11.0</AssemblyVersion>
-    <FileVersion>2.11.0</FileVersion>
+    <AssemblyVersion>2.11.1</AssemblyVersion>
+    <FileVersion>2.11.1</FileVersion>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
   </PropertyGroup>