diff --git a/appveyor.yml b/appveyor.yml
index 3de24b5..1327f6b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -6,32 +6,38 @@ os:
 shallow_clone: true
 
 environment:
-  LUAROCKS_VER: 2.2.1
-  CURL_VER: 7.50.1
+  LR_EXTERNAL: c:\external
+  CURL_VER: 7.51.0
 
   matrix:
-    - LUA_VER: 5.1.5
-    - LUA_VER: 5.2.4
-    - LUA_VER: 5.3.0
-    # - LJ_VER: 2.0.3
-    # - LJ_VER: 2.1
+  - LUA: "lua 5.1"
+  - LUA: "lua 5.2"
+  - LUA: "lua 5.3"
 
 platform:
   - x64
   - x86
+  # - mingw
 
 cache:
-  - c:\lua -> appveyor.yml
-  - c:\external -> appveyor.yml
-  - C:\Program Files (x86)\LuaRocks -> appveyor.yml
-  - C:\Program Files\LuaRocks -> appveyor.yml
-
-init:
-  - call "C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\vcvarsall.bat" %platform%
+  - c:\hererocks -> appveyor.yml
 
 install:
-  # Setup Lua development/build environment
-  - call .appveyor\install.bat
+  - set PATH=C:\Python27\Scripts;%LR_EXTERNAL%;%PATH%
+  - if /I "%platform%"=="x86" set HR_TARGET=vs_32
+  - if /I "%platform%"=="x64" set HR_TARGET=vs_64
+  - if /I "%platform%"=="mingw" set HR_TARGET=mingw
+  - if /I "%platform%"=="mingw" set PATH=C:\MinGW\bin;%PATH%
+  - if not exist "%LR_EXTERNAL%" (
+      mkdir "%LR_EXTERNAL%" &&
+      mkdir "%LR_EXTERNAL%\lib" &&
+      mkdir "%LR_EXTERNAL%\include"
+    )
+  - if not exist c:\hererocks (
+      pip install hererocks &&
+      hererocks c:\hererocks --%LUA% --target %HR_TARGET% -rlatest &&
+      call c:\hererocks\bin\activate
+    )
 
 before_build:
   # external deps
@@ -45,11 +51,11 @@ build_script:
 
 before_test:
   # test deps
-  - luarocks install lunitx
-  - luarocks install dkjson
-  - luarocks install luafilesystem
-  - if "%LUA_SHORTV%"=="5.1" luarocks install bit32
-  - luarocks install lua-path
+  - if "%LUA%"=="lua 5.1" luarocks show bit32 >nul 2>&1 || luarocks install bit32
+  - luarocks show lunitx >nul 2>&1 || luarocks install lunitx
+  - luarocks show dkjson >nul 2>&1 || luarocks install dkjson
+  - luarocks show luafilesystem >nul 2>&1 || luarocks install luafilesystem
+  - luarocks show lua-path >nul 2>&1 || luarocks install lua-path
 
 test_script:
   - echo "Testing..."
diff --git a/src/lcerr_easy.h b/src/lcerr_easy.h
index 3c8cd4c..8450ed4 100644
--- a/src/lcerr_easy.h
+++ b/src/lcerr_easy.h
@@ -8,7 +8,11 @@ ERR_ENTRY ( NOT_BUILT_IN             )
 ERR_ENTRY ( COULDNT_RESOLVE_PROXY    )
 ERR_ENTRY ( COULDNT_RESOLVE_HOST     )
 ERR_ENTRY ( COULDNT_CONNECT          )
+#if LCURL_CURL_VER_GE(7,51,0)
+ERR_ENTRY ( WEIRD_SERVER_REPLY       )
+#else
 ERR_ENTRY ( FTP_WEIRD_SERVER_REPLY   )
+#endif
 ERR_ENTRY ( REMOTE_ACCESS_DENIED     )
 #if LCURL_CURL_VER_GE(7,31,0)
 ERR_ENTRY ( FTP_ACCEPT_FAILED        )
diff --git a/src/lcerror.c b/src/lcerror.c
index 29f7672..a130d9f 100644
--- a/src/lcerror.c
+++ b/src/lcerror.c
@@ -278,6 +278,15 @@ static const lcurl_const_t lcurl_error_codes[] = {
 #include "lcerr_easy.h"
 #undef ERR_ENTRY
 
+/* libcurl rename CURLE_FTP_WEIRD_SERVER_REPLY to CURLE_WEIRD_SERVER_REPLY in version 7.51.0*/
+/* we can not have both codes in general because we have to be able convern error number to error name*/
+/* so we use newest name but add error code as alias.*/
+#if LCURL_CURL_VER_GE(7,51,0)
+  { "E_FTP_WEIRD_SERVER_REPLY", CURLE_FTP_WEIRD_SERVER_REPLY },
+#else
+  { "E_WEIRD_SERVER_REPLY", CURLE_FTP_WEIRD_SERVER_REPLY },
+#endif
+
 #define ERR_ENTRY(N) { "E_MULTI_"#N, CURLM_##N },
 #include "lcerr_multi.h"
 #undef ERR_ENTRY
diff --git a/src/lcopteasy.h b/src/lcopteasy.h
index e6d4773..b5531cf 100644
--- a/src/lcopteasy.h
+++ b/src/lcopteasy.h
@@ -30,6 +30,11 @@
 #  define LCURL_DEFAULT_VALUE 0
 #endif
 
+#ifdef TCP_FASTOPEN
+#  define LCURL__TCP_FASTOPEN TCP_FASTOPEN
+#  undef TCP_FASTOPEN
+#endif
+
 OPT_ENTRY( verbose,                VERBOSE,                  LNG, 0,                  LCURL_DEFAULT_VALUE )
 OPT_ENTRY( header,                 HEADER,                   LNG, 0,                  LCURL_DEFAULT_VALUE )
 OPT_ENTRY( noprogress,             NOPROGRESS,               LNG, 0,                  1 )
@@ -342,11 +347,18 @@ OPT_ENTRY( stream_weight,      STREAM_WEIGHT,      LNG, 0,                  LCUR
 #if LCURL_CURL_VER_GE(7,48,0)
 OPT_ENTRY( tftp_no_options,    TFTP_NO_OPTIONS,    LNG, 0,                  LCURL_DEFAULT_VALUE )
 #endif
-
 #if LCURL_CURL_VER_GE(7,49,0)
 OPT_ENTRY( tcp_fastopen,       TCP_FASTOPEN,       LNG, 0,                  LCURL_DEFAULT_VALUE )
 OPT_ENTRY( connect_to,         CONNECT_TO,         LST, 0,                  LCURL_DEFAULT_VALUE )
 #endif
+#if LCURL_CURL_VER_GE(7,51,0)
+OPT_ENTRY( keep_sending_on_error, KEEP_SENDING_ON_ERROR, LNG, 0,            LCURL_DEFAULT_VALUE )
+#endif
+
+#ifdef LCURL__TCP_FASTOPEN
+#  define TCP_FASTOPEN LCURL__TCP_FASTOPEN
+#  undef LCURL__TCP_FASTOPEN
+#endif
 
 #ifdef OPT_ENTRY_IS_NULL
 #  undef OPT_ENTRY
@@ -355,4 +367,3 @@ OPT_ENTRY( connect_to,         CONNECT_TO,         LST, 0,                  LCUR
 #ifdef FLG_ENTRY_IS_NULL
 #  undef FLG_ENTRY
 #endif
-
diff --git a/test/run.lua b/test/run.lua
index 4bb5057..44a694b 100644
--- a/test/run.lua
+++ b/test/run.lua
@@ -12,7 +12,8 @@ local ok, curl = pcall(require, "cURL")
 local version if ok then
   version = curl.version()
 else
-  version = "<UNKNOWN>"
+  io.stderr:write('can not load cURL:' .. curl)
+  os.exit(-1)
 end
 
 print("------------------------------------")