diff --git a/cwt/cose.py b/cwt/cose.py
index d77f0c7..03aa1a3 100644
--- a/cwt/cose.py
+++ b/cwt/cose.py
@@ -203,7 +203,7 @@ def decode(self, data: Union[bytes, CBORTag], key: COSEKey) -> Dict[int, Any]:
 
         Args:
             data (Union[bytes, CBORTag]): A byte string or cbor2.CBORTag of an
-            encoded data.
+                encoded data.
             key (COSEKey): A COSE key to verify and decrypt the encoded data.
         Returns:
             Dict[int, Any]: A decoded CBOR-like object.
diff --git a/docs/conf.py b/docs/conf.py
index cfc73a5..3194fe5 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -43,6 +43,7 @@
     ("py:class", "_cbor2.CBORTag"),
     ("py:class", "cwt.exceptions.CWTError"),
     ("py:class", "cwt.recipient.Recipient"),
+    ("py:class", "CBORTag"),
 ]
 
 # Add any paths that contain templates here, relative to this directory.