diff --git a/OpenSSL/crypto.py b/OpenSSL/crypto.py
index a52862c..446f7f8 100644
--- a/OpenSSL/crypto.py
+++ b/OpenSSL/crypto.py
@@ -1578,7 +1578,7 @@
         Convert an OpenSSL native context error failure into a Python
         exception.
 
-        When a call to native OpenSSL X509_verify_cert fails, additonal information
+        When a call to native OpenSSL X509_verify_cert fails, additional information
         about the failure can be obtained from the store context.
         """
         errors = [
@@ -1616,7 +1616,7 @@
 
         :param store_ctx: The :py:class:`X509StoreContext` to verify.
 
-        :raises X509StoreContextError: If an error occured when validating a
+        :raises X509StoreContextError: If an error occurred when validating a
           certificate in the context. Sets ``certificate`` attribute to indicate
           which certificate caused the error.
         """
@@ -1784,7 +1784,7 @@
         b"cessationOfOperation",
         b"certificateHold",
         # b"removeFromCRL",
-        ]
+    ]
 
     def __init__(self):
         revoked = _lib.X509_REVOKED_new()