diff --git a/examples/main.tf b/examples/main.tf
index 824ab6bd0..d530104eb 100644
--- a/examples/main.tf
+++ b/examples/main.tf
@@ -1,6 +1,6 @@
 resource "netbox_dcim_device_role" "device_role_test" {
   name = "Test device role"
-  slug = "Test device role"
+  slug = "Test_device_role"
   description = "Device role for testing"
   color = "00ff00"
 }
@@ -320,7 +320,7 @@ resource "netbox_ipam_prefix" "dynamic_prefix_test" {
   parent_prefix {
     prefix = netbox_ipam_prefix.prefix_test.id
     prefix_length = 26
-  } 
+  }
   description = "Dynamic prefix created by terraform"
 }
 
diff --git a/examples/provider/provider.tf b/examples/provider/provider.tf
index b9c350dec..f590ad9d9 100644
--- a/examples/provider/provider.tf
+++ b/examples/provider/provider.tf
@@ -1,9 +1,8 @@
 terraform {
-  required_version = ">= 0.14.0"
   required_providers {
     netbox = {
       source = "smutel/netbox"
-      version = "~> 4.0.0"
+      version = "~> 6.0.0"
     }
   }
 }
diff --git a/netbox/dcim/resource_netbox_dcim_site.go b/netbox/dcim/resource_netbox_dcim_site.go
index bf2211e19..0a0e65dc4 100644
--- a/netbox/dcim/resource_netbox_dcim_site.go
+++ b/netbox/dcim/resource_netbox_dcim_site.go
@@ -213,7 +213,6 @@ func resourceNetboxDcimSiteCreate(ctx context.Context, d *schema.ResourceData,
 		Slug:            &slug,
 		Status:          d.Get("status").(string),
 		Tags:            tag.ConvertTagsToNestedTags(tags),
-		TimeZone:        d.Get("time_zone").(string),
 	}
 
 	if groupID != 0 {
@@ -225,6 +224,9 @@ func resourceNetboxDcimSiteCreate(ctx context.Context, d *schema.ResourceData,
 	if tenantID != 0 {
 		newResource.Tenant = &tenantID
 	}
+	if timezone := d.Get("time_zone").(string); timezone != "" {
+		newResource.TimeZone = &timezone
+	}
 
 	resource := dcim.NewDcimSitesCreateParams().WithData(newResource)
 
@@ -431,7 +433,7 @@ func resourceNetboxDcimSiteUpdate(ctx context.Context, d *schema.ResourceData,
 	}
 	if d.HasChange("time_zone") {
 		timeZone := d.Get("time_zone").(string)
-		params.TimeZone = timeZone
+		params.TimeZone = &timeZone
 		modifiedFields["time_zone"] = timeZone
 	}