diff --git a/openapi.json b/openapi.json
index 0eaa63b..8417173 100644
--- a/openapi.json
+++ b/openapi.json
@@ -7308,6 +7308,7 @@
           "sn": {
             "type": "string",
             "nullable": true,
+            "pattern": "^[a-zA-Z0-9_-]+$",
             "description": "Serial number of the device."
           },
           "display_name": {
@@ -7320,6 +7321,7 @@
           "price_id": {
             "type": "string",
             "nullable": true,
+            "pattern": "^[a-zA-Z0-9_-]+$",
             "description": "Stripe price ID for billing purposes."
           },
           "status": {
@@ -7447,6 +7449,7 @@
           },
           "sn": {
             "type": "string",
+            "pattern": "^[a-zA-Z0-9_-]+$",
             "description": "Serial number of the device. This field is required when creating a device."
           }
         }
@@ -7469,7 +7472,8 @@
               },
               "sn": {
                 "type": "string",
-                "nullable": true
+                "nullable": true,
+                "pattern": "^[a-zA-Z0-9_-]+$"
               },
               "display_name": {
                 "type": "string",
@@ -7479,7 +7483,8 @@
               },
               "price_id": {
                 "type": "string",
-                "nullable": true
+                "nullable": true,
+                "pattern": "^[a-zA-Z0-9_-]+$"
               },
               "status": {
                 "$ref": "#/components/schemas/DeviceStatus"
@@ -7500,6 +7505,7 @@
         "properties": {
           "sn": {
             "type": "string",
+            "pattern": "^[a-zA-Z0-9_-]+$",
             "description": "Device serial number",
             "example": "SFVA78RABZ12345678"
           },
diff --git a/openapi.yaml b/openapi.yaml
index 44affef..4275c05 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -5776,6 +5776,7 @@ components:
         sn:
           type: string
           nullable: true
+          pattern: ^[a-zA-Z0-9_-]+$
           description: Serial number of the device.
         display_name:
           type: string
@@ -5786,6 +5787,7 @@ components:
         price_id:
           type: string
           nullable: true
+          pattern: ^[a-zA-Z0-9_-]+$
           description: Stripe price ID for billing purposes.
         status:
           $ref: '#/components/schemas/DeviceStatus'
@@ -5940,6 +5942,7 @@ components:
             '
         sn:
           type: string
+          pattern: ^[a-zA-Z0-9_-]+$
           description: Serial number of the device. This field is required when creating
             a device.
     DeviceUpdate:
@@ -5962,6 +5965,7 @@ components:
           sn:
             type: string
             nullable: true
+            pattern: ^[a-zA-Z0-9_-]+$
           display_name:
             type: string
             nullable: true
@@ -5970,6 +5974,7 @@ components:
           price_id:
             type: string
             nullable: true
+            pattern: ^[a-zA-Z0-9_-]+$
           status:
             $ref: '#/components/schemas/DeviceStatus'
           metadata:
@@ -5982,6 +5987,7 @@ components:
       properties:
         sn:
           type: string
+          pattern: ^[a-zA-Z0-9_-]+$
           description: Device serial number
           example: SFVA78RABZ12345678
         model_name: