diff --git a/powershell/package.json b/powershell/package.json
index fbc8b2852c4..db47313add4 100644
--- a/powershell/package.json
+++ b/powershell/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@autorest/powershell",
-  "version": "2.1.600",
+  "version": "2.1.700",
   "description": "AutoRest PowerShell Cmdlet Generator",
   "main": "dist/exports.js",
   "typings": "dist/exports.d.ts",
diff --git a/powershell/resources/runtime/csharp/json/Customizations/IJsonSerializable.cs b/powershell/resources/runtime/csharp/json/Customizations/IJsonSerializable.cs
index 6ff62c02a44..ceb12aa7026 100644
--- a/powershell/resources/runtime/csharp/json/Customizations/IJsonSerializable.cs
+++ b/powershell/resources/runtime/csharp/json/Customizations/IJsonSerializable.cs
@@ -157,6 +157,14 @@ internal static JsonNode ToJsonValue(object value)
                 return Microsoft.Rest.ClientRuntime.JsonSerializable.ToJson(dictionary, null);
             }
 
+            // hashtables are converted to dictionaries for serialization
+            if (value is System.Collections.Hashtable hashtable)
+            {
+                var dict = new System.Collections.Generic.Dictionary<string, object>();
+                DictionaryExtensions.HashTableToDictionary<object>(hashtable, dict);
+                return Microsoft.Rest.ClientRuntime.JsonSerializable.ToJson(dict, null);
+            }
+
             // enumerable collections are handled like arrays (again, fallback to ToJson()/ToJsonString() or literal JsonString)
             if (value is System.Collections.IEnumerable enumerableValue)
             {