diff --git a/hcloud/hcloud.go b/hcloud/hcloud.go
index 2585be37..9064d393 100644
--- a/hcloud/hcloud.go
+++ b/hcloud/hcloud.go
@@ -2,4 +2,4 @@
 package hcloud
 
 // Version is the library's version following Semantic Versioning.
-const Version = "1.26.0"
+const Version = "1.26.1"
diff --git a/hcloud/schema/firewall.go b/hcloud/schema/firewall.go
index 208a1b52..93c90665 100644
--- a/hcloud/schema/firewall.go
+++ b/hcloud/schema/firewall.go
@@ -42,8 +42,8 @@ type FirewallCreateRequest struct {
 // FirewallResource defines the schema of a resource to apply the new Firewall on.
 type FirewallResource struct {
 	Type          string                         `json:"type"`
-	Server        *FirewallResourceServer        `json:"server"`
-	LabelSelector *FirewallResourceLabelSelector `json:"label_selector"`
+	Server        *FirewallResourceServer        `json:"server,omitempty"`
+	LabelSelector *FirewallResourceLabelSelector `json:"label_selector,omitempty"`
 }
 
 // FirewallResourceLabelSelector defines the schema of a LabelSelector to apply a Firewall on.