diff --git a/backend/models/form.py b/backend/models/form.py
index f19ed85d..838cd68c 100644
--- a/backend/models/form.py
+++ b/backend/models/form.py
@@ -1,4 +1,5 @@
 import typing as t
+import re
 
 import httpx
 from pydantic import constr, BaseModel, Field, root_validator, validator
@@ -17,6 +18,10 @@
     "discord_role"
 ]
 
+WEBHOOK_PATTERN = "(?P<scheme>https?)://(?P<domain>(?:ptb.|canary.)?discord(?:app)?.com)" \
+                  "/api(?:/)?(?P<api_version>v\\d{1,2})?/webhooks/" \
+                  "(?P<webhook_identifier>\\d{17,21})/(?P<webhook_token>[\\w-]{68})"
+
 
 class _WebHook(BaseModel):
     """Schema model of discord webhooks."""
@@ -26,7 +31,7 @@ class _WebHook(BaseModel):
     @validator("url")
     def validate_url(cls, url: str) -> str:
         """Validates URL parameter."""
-        if "discord.com/api/webhooks/" not in url:
+        if not re.match(WEBHOOK_PATTERN, url):
             raise ValueError("URL must be a discord webhook.")
 
         return url