diff --git a/Doxyfile b/Doxyfile
index 7300daa0..4dcbf7fe 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -41,7 +41,7 @@ PROJECT_NAME           = Crypto++
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 6.0
+PROJECT_NUMBER         = 5.6.5
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/config.h b/config.h
index 9ad864f8..ace6930d 100644
--- a/config.h
+++ b/config.h
@@ -74,7 +74,7 @@
 //   the version of the library the headers came from. It is not
 //   necessarily the version of the library built as a shared object if
 //   versions are inadvertently mixed and matched.
-#define CRYPTOPP_VERSION 600
+#define CRYPTOPP_VERSION 565
 
 // Define this if you want to set a prefix for TestData/ and TestVectors/
 //   Be mindful of the trailing slash since its simple concatenation.
diff --git a/cryptlib.h b/cryptlib.h
index 6050525e..6fd939f4 100644
--- a/cryptlib.h
+++ b/cryptlib.h
@@ -3,7 +3,7 @@
 /// \file cryptlib.h
 /// \brief Abstract base classes that provide a uniform interface to this library.
 
-/*!	\mainpage Crypto++ Library 6.0 API Reference
+/*!	\mainpage Crypto++ Library 5.6.5 API Reference
 <dl>
 <dt>Abstract Base Classes<dd>
 	cryptlib.h
diff --git a/nacl.h b/nacl.h
index 4dd909c4..10a0a487 100644
--- a/nacl.h
+++ b/nacl.h
@@ -361,7 +361,7 @@ int crypto_sign(uint8_t *sm,uint64_t *smlen,const uint8_t *m,uint64_t n,const ui
 /// \param m output byte buffer
 /// \param mlen size of the output byte buffer
 /// \param sm input byte buffer
-/// \param smlen size of the input byte buffer
+/// \param n size of the input byte buffer
 /// \param pk public key
 /// \returns 0 on success, non-0 otherwise
 /// \sa <A HREF="https://nacl.cr.yp.to/sign.html">NaCl crypto_sign documentation</A>
@@ -369,8 +369,8 @@ int crypto_sign(uint8_t *sm,uint64_t *smlen,const uint8_t *m,uint64_t n,const ui
 int crypto_sign_open(uint8_t *m,uint64_t *mlen,const uint8_t *sm,uint64_t n,const uint8_t *pk);
 
 /// \brief Generate a keypair for signing
-/// \param y public key byte buffer
-/// \param x private key byte buffer
+/// \param pk public key byte buffer
+/// \param sk private key byte buffer
 /// \details crypto_sign_keypair() creates an ed25519 keypair.
 /// \returns 0 on success, non-0 otherwise
 /// \sa <A HREF="https://nacl.cr.yp.to/sign.html">NaCl crypto_sign documentation</A>