diff --git a/lib/philomena/user_links/user_link.ex b/lib/philomena/user_links/user_link.ex
index a21e50c7..b79ffbf4 100644
--- a/lib/philomena/user_links/user_link.ex
+++ b/lib/philomena/user_links/user_link.ex
@@ -52,6 +52,7 @@ defmodule Philomena.UserLinks.UserLink do
     |> put_assoc(:tag, tag)
     |> put_assoc(:user, user)
     |> validate_required([:user, :uri, :public])
+    |> validate_format(:uri, ~r|\Ahttps?://|)
     |> parse_uri()
     |> put_verification_code()
     |> put_next_check_at()