diff --git a/gns3server/schemas/controller/templates/iou_templates.py b/gns3server/schemas/controller/templates/iou_templates.py
index 02ab06696..36468d8aa 100644
--- a/gns3server/schemas/controller/templates/iou_templates.py
+++ b/gns3server/schemas/controller/templates/iou_templates.py
@@ -22,11 +22,11 @@ from pydantic import Field
 from typing import Optional
 
 
-class IOUTemplate(TemplateBase):
+class IOUTemplateBase(TemplateBase):
     category: Optional[Category] = Category.router
     default_name_format: Optional[str] = "IOU{0}"
     symbol: Optional[str] = "multilayer_switch"
-    path: str = Field(..., description="Path of IOU executable")
+    path: Optional[str] = Field(None, description="Path of IOU executable")
     ethernet_adapters: Optional[int] = Field(2, ge=0, description="Number of ethernet adapters")
     serial_adapters: Optional[int] = Field(2, ge=0, description="Number of serial adapters")
     ram: Optional[int] = Field(1024, gt=0, description="Amount of RAM in MB")
@@ -44,5 +44,9 @@ class IOUTemplate(TemplateBase):
     )
 
 
-class IOUTemplateUpdate(IOUTemplate):
-    path: Optional[str] = Field(None, description="Path of IOU executable")
+class IOUTemplate(IOUTemplateBase):
+    path: str = Field(..., description="Path of IOU executable")
+
+
+class IOUTemplateUpdate(IOUTemplateBase):
+    pass
diff --git a/pyproject.toml b/pyproject.toml
index 258447eb6..23a3afc29 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -391,7 +391,6 @@ module = [
   "gns3server.schemas.controller.projects",  # 2
   "gns3server.schemas.controller.settings",  # 3
   "gns3server.schemas.controller.templates.docker_templates",  # 1
-  "gns3server.schemas.controller.templates.iou_templates",  # 1
   "gns3server.schemas.controller.templates.virtualbox_templates",  # 1
   "gns3server.schemas.controller.templates.vmware_templates",  # 1
   "gns3server.schemas.qemu_disk_image",  # 2