diff --git a/OpenSSL/RATIONALE b/OpenSSL/RATIONALE
index a0e389c..074422c 100644
--- a/OpenSSL/RATIONALE
+++ b/OpenSSL/RATIONALE
@@ -30,7 +30,7 @@
        This could of course be done a lot better than the way it works now,
        so more transport layers than sockets are possible!
  + A well-organized error system that mimics OpenSSL's error system is
-   desireable.  Specifically there has to be a way to find out wether the
+   desirable.  Specifically there has to be a way to find out wether the
    operation was successful, or if it failed, why it failed, so some sort
    of interface to OpenSSL's error queue mechanism is needed.
  + Certificate objects (X509) and certificate name objects (X509_NAME) are
diff --git a/OpenSSL/crypto.py b/OpenSSL/crypto.py
index 313a30a..8d971f2 100644
--- a/OpenSSL/crypto.py
+++ b/OpenSSL/crypto.py
@@ -1897,7 +1897,7 @@
 
     def set_ca_certificates(self, cacerts):
         """
-        Replace or set the CA certificates withing the PKCS12 object.
+        Replace or set the CA certificates within the PKCS12 object.
 
         :param cacerts: The new CA certificates.
         :type cacerts: :py:data:`None` or an iterable of :py:class:`X509`
diff --git a/OpenSSL/test/test_crypto.py b/OpenSSL/test/test_crypto.py
index 60f9e6a..f704ac0 100644
--- a/OpenSSL/test/test_crypto.py
+++ b/OpenSSL/test/test_crypto.py
@@ -536,7 +536,7 @@
 
     def test_issuer(self):
         """
-        If an extension requires a issuer, the :py:data:`issuer` parameter to
+        If an extension requires an issuer, the :py:data:`issuer` parameter to
         :py:class:`X509Extension` provides its value.
         """
         ext2 = X509Extension(
@@ -1212,7 +1212,7 @@
     def test_verify_success(self):
         """
         :py:obj:`X509Req.verify` returns :py:obj:`True` if called with a
-        :py:obj:`OpenSSL.crypto.PKey` which represents the public part ofthe key
+        :py:obj:`OpenSSL.crypto.PKey` which represents the public part of the key
         which signed the request.
         """
         request = X509Req()