diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 62262e04..20120dce 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -17,6 +17,7 @@ Changed
 Fixed
 -----
 - Fix handling all access denied errors when enumerating characteristics on Windows. Fixes #1291.
+- Added support for 32bit UUIDs. Fixes #1314 
 
 `0.20.2`_ (2023-04-19)
 ======================
diff --git a/bleak/uuids.py b/bleak/uuids.py
index 281975e8..0ea79d44 100644
--- a/bleak/uuids.py
+++ b/bleak/uuids.py
@@ -1155,13 +1155,19 @@ def normalize_uuid_str(uuid: str) -> str:
     Normaizes a UUID to the format used by Bleak.
 
     - Converted to lower case.
-    - 16-bit UUIDs are expanded to 128-bit.
+    - 16-bit and 32-bit UUIDs are expanded to 128-bit.
 
     .. versionadded:: 0.20.0
+    .. versionchanged:: 0.21.0
+        Added support for 32-bit UUIDs.
     """
+    # See: BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 3, Part B - Section 2.5.1
     if len(uuid) == 4:
         # Bluetooth SIG registered 16-bit UUIDs
         uuid = f"0000{uuid}-0000-1000-8000-00805f9b34fb"
+    elif len(uuid) == 8:
+        # Bluetooth SIG registered 32-bit UUIDs
+        uuid = f"{uuid}-0000-1000-8000-00805f9b34fb"
 
     # let UUID class do the validation and conversion to lower case
     return str(UUID(uuid))
diff --git a/tests/test_uuid.py b/tests/test_uuid.py
index ab97edda..c306f040 100644
--- a/tests/test_uuid.py
+++ b/tests/test_uuid.py
@@ -3,6 +3,7 @@
 
 def test_uuid_length_normalization():
     assert normalize_uuid_str("1801") == "00001801-0000-1000-8000-00805f9b34fb"
+    assert normalize_uuid_str("DAF51C01") == "daf51c01-0000-1000-8000-00805f9b34fb"
 
 
 def test_uuid_case_normalization():