diff --git a/linkcheck/checker/unknownurl.py b/linkcheck/checker/unknownurl.py
index d51af174..52e79246 100644
--- a/linkcheck/checker/unknownurl.py
+++ b/linkcheck/checker/unknownurl.py
@@ -412,6 +412,8 @@ ignored_schemes_other = r"""
 |isbn       # ISBN (int. book numbers)
 |javascript # JavaScript
 |slack      # Slack Technologies client
+|tg         # Telegram
+|whatsapp   # WhatsApp
 """
 
 ignored_schemes = "^(%s%s%s%s)$" % (
diff --git a/scripts/update_iana_uri_schemes.py b/scripts/update_iana_uri_schemes.py
index 1e25a742..f58a8153 100644
--- a/scripts/update_iana_uri_schemes.py
+++ b/scripts/update_iana_uri_schemes.py
@@ -16,6 +16,8 @@ iana_uri_schemes_other = {
     "isbn": "ISBN (int. book numbers)",
     "javascript": "JavaScript",
     "slack": "Slack Technologies client",
+    "tg": "Telegram",
+    "whatsapp": "WhatsApp",
 }
 
 filter_uri_schemes_permanent = (