diff --git a/src/modules/Elsa.Expressions/Options/ExpressionOptions.cs b/src/modules/Elsa.Expressions/Options/ExpressionOptions.cs
index 460835be1..ec5ac1c19 100644
--- a/src/modules/Elsa.Expressions/Options/ExpressionOptions.cs
+++ b/src/modules/Elsa.Expressions/Options/ExpressionOptions.cs
@@ -24,16 +24,17 @@ public class ExpressionOptions
         this.AddTypeAlias<bool>("Boolean");
         this.AddTypeAlias<decimal>("Decimal");
         this.AddTypeAlias<double>("Double");
+        this.AddTypeAlias<byte[]>("ByteArray");
         this.AddTypeAlias<Guid>("Guid");
         this.AddTypeAlias<DateTime>("DateTime");
         this.AddTypeAlias<DateTimeOffset>("DateTimeOffset");
         this.AddTypeAlias<TimeSpan>("TimeSpan");
-        this.AddTypeAlias<ExpandoObject>("ExpandoObject");
+        this.AddTypeAlias<Stream>("Stream");
         this.AddTypeAlias<ExpandoObject>("JSON");
-        this.AddTypeAlias<Dictionary<string, string>>("StringDictionary");
+        this.AddTypeAlias<IDictionary<string, string>>("StringDictionary");
+        this.AddTypeAlias<IDictionary<string, object>>("ObjectDictionary");
         this.AddTypeAlias<Dictionary<string, string>>("StringMap");
         this.AddTypeAlias<Dictionary<string, object>>("ObjectMap");
-        this.AddTypeAlias<Dictionary<string, object>>("ObjectDictionary");
     }
     
     /// Gets the type alias dictionary.
diff --git a/src/modules/Elsa.Http/Features/HttpFeature.cs b/src/modules/Elsa.Http/Features/HttpFeature.cs
index 57e76dc51..f355a0ace 100644
--- a/src/modules/Elsa.Http/Features/HttpFeature.cs
+++ b/src/modules/Elsa.Http/Features/HttpFeature.cs
@@ -217,6 +217,11 @@ public class HttpFeature : FeatureBase
 
         Services.Configure<ExpressionOptions>(options =>
         {
+            options.AddTypeAlias<HttpRequest>("HttpRequest");
+            options.AddTypeAlias<HttpResponse>("HttpResponse");
+            options.AddTypeAlias<HttpResponseMessage>("HttpResponseMessage");
+            options.AddTypeAlias<HttpHeaders>("HttpHeaders");
+            options.AddTypeAlias<RouteData>("RouteData");
             options.AddTypeAlias<IFormFile>("FormFile");
             options.AddTypeAlias<IFormFile[]>("FormFile[]");
             options.AddTypeAlias<HttpFile>("HttpFile");
diff --git a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JArrayIsland.json b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JArrayIsland.json
index f78e01922..b5b0378dc 100644
--- a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JArrayIsland.json
+++ b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JArrayIsland.json
@@ -4,5 +4,5 @@
     "_island": "[\r\n  {\r\n    \u0022path\u0022: \u0022folder1\u0022,\r\n    \u0022command\u0022: \u0022add\u0022\r\n  }\r\n]",
     "_type": "Newtonsoft.Json.Linq.JArray, Newtonsoft.Json"
   },
-  "_type": "ObjectDictionary"
+  "_type": "ObjectMap"
 }
\ No newline at end of file
diff --git a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JArrayWithoutType.json b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JArrayWithoutType.json
index 42c531e42..33b4f89f9 100644
--- a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JArrayWithoutType.json
+++ b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JArrayWithoutType.json
@@ -6,5 +6,5 @@
       "command": "add"
     }
   ],
-  "_type": "ObjectDictionary"
+  "_type": "ObjectMap"
 }
\ No newline at end of file
diff --git a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JObjectIsland.json b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JObjectIsland.json
index ddc4af5d9..088f33e15 100644
--- a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JObjectIsland.json
+++ b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JObjectIsland.json
@@ -4,5 +4,5 @@
     "_island": "{\r\n  \u0022file1\u0022: {\r\n    \u0022script\u0022: [\r\n      {\r\n        \u0022path\u0022: \u0022folder1\u0022,\r\n        \u0022command\u0022: \u0022add\u0022\r\n      }\r\n    ]\r\n  }\r\n}",
     "_type": "Newtonsoft.Json.Linq.JObject, Newtonsoft.Json"
   },
-  "_type": "ObjectDictionary"
+  "_type": "ObjectMap"
 }
\ No newline at end of file
diff --git a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JObjectWithoutType.json b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JObjectWithoutType.json
index 9a42638c9..6050dd05c 100644
--- a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JObjectWithoutType.json
+++ b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JObjectWithoutType.json
@@ -10,5 +10,5 @@
       ]
     }
   },
-  "_type": "ObjectDictionary"
+  "_type": "ObjectMap"
 }
\ No newline at end of file
diff --git a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonArrayIsland.json b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonArrayIsland.json
index 1f33d0c25..a73017d36 100644
--- a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonArrayIsland.json
+++ b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonArrayIsland.json
@@ -4,5 +4,5 @@
     "_island": "[\r\n  {\r\n    \u0022path\u0022: \u0022folder1\u0022,\r\n    \u0022command\u0022: \u0022add\u0022\r\n  }\r\n]",
     "_type": "System.Text.Json.Nodes.JsonArray, System.Text.Json"
   },
-  "_type": "ObjectDictionary"
+  "_type": "ObjectMap"
 }
\ No newline at end of file
diff --git a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonObjectIsland.json b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonObjectIsland.json
index cc7a4135e..661b6327e 100644
--- a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonObjectIsland.json
+++ b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonObjectIsland.json
@@ -4,5 +4,5 @@
     "_island": "{\r\n  \u0022file1\u0022: {\r\n    \u0022script\u0022: [\r\n      {\r\n        \u0022path\u0022: \u0022folder1\u0022,\r\n        \u0022command\u0022: \u0022add\u0022\r\n      }\r\n    ]\r\n  }\r\n}",
     "_type": "System.Text.Json.Nodes.JsonObject, System.Text.Json"
   },
-  "_type": "ObjectDictionary"
+  "_type": "ObjectMap"
 }
\ No newline at end of file
diff --git a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonObjectWithoutType.json b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonObjectWithoutType.json
index 9a42638c9..6050dd05c 100644
--- a/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonObjectWithoutType.json
+++ b/test/integration/Elsa.Workflows.IntegrationTests/Serialization/JsonSerialization/JsonObjectWithoutType.json
@@ -10,5 +10,5 @@
       ]
     }
   },
-  "_type": "ObjectDictionary"
+  "_type": "ObjectMap"
 }
\ No newline at end of file