diff --git a/README.md b/README.md
index 1ae43ff4e947bbda68778a506bfe420242548869..d919cff10a27357e410053db9d0b3f4c799c3c96 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![Build Status](https://travis-ci.org/sfackler/rust-openssl.svg?branch=master)](https://travis-ci.org/sfackler/rust-openssl)
 
-[Documentation](https://sfackler.github.io/rust-openssl/doc/v0.8.2/openssl).
+[Documentation](https://sfackler.github.io/rust-openssl/doc/v0.8.3/openssl).
 
 ## Building
 
@@ -39,6 +39,8 @@ export OPENSSL_INCLUDE_DIR=`brew --prefix openssl`/include
 export OPENSSL_LIB_DIR=`brew --prefix openssl`/lib
 ```
 
+May be necessary clean the repository with `cargo clean` before build again.
+
 ### Windows
 
 On Windows, consider building with [mingw-w64](http://mingw-w64.org/).
diff --git a/appveyor.yml b/appveyor.yml
index 054b88f2fb8828773ca3e18270c680a3d032ebcc..4cd6c2318b8f3eefefc1bc9f41952df06fff07f0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -5,8 +5,8 @@ environment:
   matrix:
   - TARGET: i686-pc-windows-gnu
     BITS: 32
-#  - TARGET: x86_64-pc-windows-msvc
-#    BITS: 64
+  - TARGET: x86_64-pc-windows-msvc
+    BITS: 64
 install:
   - ps: Start-FileDownload "http://slproweb.com/download/Win${env:BITS}OpenSSL-1_0_2h.exe"
   - Win%BITS%OpenSSL-1_0_2h.exe /SILENT /VERYSILENT /SP- /DIR="C:\OpenSSL"
diff --git a/openssl/Cargo.toml b/openssl/Cargo.toml
index 96402eb87980c42ef4467bbcdfbc72dc98cdb5f0..3fd46c4b957cc89f467cd6e5ee51da1347223785 100644
--- a/openssl/Cargo.toml
+++ b/openssl/Cargo.toml
@@ -1,11 +1,11 @@
 [package]
 name = "openssl"
-version = "0.8.2"
+version = "0.8.3"
 authors = ["Steven Fackler <sfackler@gmail.com>"]
 license = "Apache-2.0"
 description = "OpenSSL bindings"
 repository = "https://github.com/sfackler/rust-openssl"
-documentation = "https://sfackler.github.io/rust-openssl/doc/v0.8.2/openssl"
+documentation = "https://sfackler.github.io/rust-openssl/doc/v0.8.3/openssl"
 readme = "../README.md"
 keywords = ["crypto", "tls", "ssl", "dtls"]
 build = "build.rs"
diff --git a/openssl/src/crypto/util.rs b/openssl/src/crypto/util.rs
index be72aa59ccc0ce7bcd7044df93f441fdd2881678..c11285f895f1f416876038961b8926ac14956978 100644
--- a/openssl/src/crypto/util.rs
+++ b/openssl/src/crypto/util.rs
@@ -41,7 +41,7 @@ pub extern "C" fn invoke_passwd_cb<F>(buf: *mut c_char,
                                       _rwflag: c_int,
                                       cb_state: *mut c_void)
                                       -> c_int
-                                      where F: FnOnce(&mut [i8]) -> usize {
+                                      where F: FnOnce(&mut [c_char]) -> usize {
     let result = panic::catch_unwind(|| {
         // build a `i8` slice to pass to the user callback
         let pass_slice = unsafe { slice::from_raw_parts_mut(buf, size as usize) };
diff --git a/openssl/src/error.rs b/openssl/src/error.rs
index cc89b5db708eba426126f21a71bb1985f770a20e..d76e7cbd9293e1ad20f8e0e9e6c71889a9191b35 100644
--- a/openssl/src/error.rs
+++ b/openssl/src/error.rs
@@ -7,7 +7,7 @@ use std::str;
 
 use ffi;
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct ErrorStack(Vec<Error>);
 
 impl ErrorStack {
@@ -61,6 +61,7 @@ impl From<ErrorStack> for fmt::Error {
 }
 
 /// An error reported from OpenSSL.
+#[derive(Clone)]
 pub struct Error(c_ulong);
 
 impl Error {
diff --git a/openssl/src/lib.rs b/openssl/src/lib.rs
index 0c4bc51fe7c8c7afdeda8e476c77d64d05733adb..879681f4e411d3da3e90255b7063911d23fc35be 100644
--- a/openssl/src/lib.rs
+++ b/openssl/src/lib.rs
@@ -1,4 +1,4 @@
-#![doc(html_root_url="https://sfackler.github.io/rust-openssl/doc/v0.8.2")]
+#![doc(html_root_url="https://sfackler.github.io/rust-openssl/doc/v0.8.3")]
 
 #[macro_use]
 extern crate bitflags;