diff --git a/src/Resources/ResourceManager/Json/PSJsonSerializer.cs b/src/Resources/ResourceManager/Json/PSJsonSerializer.cs
index 84f05cdc56a0..eb0f29b49898 100644
--- a/src/Resources/ResourceManager/Json/PSJsonSerializer.cs
+++ b/src/Resources/ResourceManager/Json/PSJsonSerializer.cs
@@ -52,7 +52,7 @@ public static string Serialize(object value, SerializeContext context)
             {
                 object processed = ProcessValue(value, 0, context);
 
-                return JsonConvert.SerializeObject(processed, JsonExtensions.ObjectSerializationSettings);
+                return JsonConvert.SerializeObject(processed);
             }
             catch (OperationCanceledException)
             {
diff --git a/src/Resources/Resources.Test/Json/PSJsonSerializerTests.cs b/src/Resources/Resources.Test/Json/PSJsonSerializerTests.cs
index 8a52624813a6..2653a5759490 100644
--- a/src/Resources/Resources.Test/Json/PSJsonSerializerTests.cs
+++ b/src/Resources/Resources.Test/Json/PSJsonSerializerTests.cs
@@ -63,7 +63,7 @@ public void Serialize_Hashtable_Success()
             var hashtable = new Hashtable
             {
                 ["foo"] = new PSObject("fooValue"),
-                ["bar"] = true,
+                ["Bar"] = true,
                 ["nested"] = new Hashtable
                 {
                     ["foo"] = new PSObject(Guid.Parse("4d44fe86-f04a-4ba5-9900-abdec8cb11c1")),
@@ -94,7 +94,7 @@ public void Serialize_Hashtable_Success()
             JToken expected = JToken.FromObject(new
             {
                 foo = "fooValue",
-                bar = true,
+                Bar = true,
                 nested = new
                 {
                     foo = "4d44fe86-f04a-4ba5-9900-abdec8cb11c1",
diff --git a/src/Resources/Resources/ChangeLog.md b/src/Resources/Resources/ChangeLog.md
index 19300d7c0073..e9a3193d1df2 100644
--- a/src/Resources/Resources/ChangeLog.md
+++ b/src/Resources/Resources/ChangeLog.md
@@ -20,6 +20,7 @@
 ## Upcoming Release
 * Updated ARM template What-If cmdlets to remove preview message from results
 * Fixed an issue where template deployment cmdlets crash if `-WhatIf` is set at a higher scope [#13038]
+* Fixed an issue where template deployment cmdlets does not preserve case for template parameters
 * Added a default API version to be used in `Export-AzResourceGroup` cmdlet
 * Added cmdlets for Template Specs (`Get-AzTemplateSpec`, `Set-AzTemplateSpec`, `New-AzTemplateSpec`, `Remove-AzTemplateSpec`, `Export-AzTemplateSpec`)
 * Added support for deploying Template Specs using existing deployment cmdlets (via the new -TemplateSpecId parameter)