diff --git a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Execute/PostEndpoint.cs b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Execute/PostEndpoint.cs
index 796fe7b32..e5a574bf7 100644
--- a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Execute/PostEndpoint.cs
+++ b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Execute/PostEndpoint.cs
@@ -34,7 +34,11 @@ internal class PostEndpoint(
         {
             try
             {
-                request = await JsonSerializer.DeserializeAsync<PostRequest>(HttpContext.Request.Body, cancellationToken: cancellationToken);
+                request = await JsonSerializer.DeserializeAsync<PostRequest>(HttpContext.Request.Body,
+                new JsonSerializerOptions
+                {
+                    PropertyNameCaseInsensitive = true
+                }, cancellationToken: cancellationToken);
             }
             catch
             {