diff --git a/.appveyor.yml b/.appveyor.yml
index bba21b6..df64e7d 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -1,12 +1,16 @@
+version: 1.0.{build}
 image: Visual Studio 2017
-
-platform: x64
+platform:
+  - x64
 
 environment:
   global:
     GOOS: windows
     GOARCH: amd64
     GOPATH: $APPVEYOR_BUILD_FOLDER/gopath
+    APPVEYOR_SAVE_CACHE_ON_ERROR: true
+    MINGW_W64: c:\mingw-w64\x86_64-7.3.0-posix-seh-rt_v5-rev0\mingw64
+    CYGWIN_64: c:\cygwin64
     #APPVEYOR_RDP_PASSWORD: Support0dell0com**1987
 
   matrix:
@@ -19,7 +23,16 @@ environment:
   #- PYTHON: "C:\\Python34-x64"
   #  DISTUTILS_USE_SDK: "1"
   #        - PYTHON: "C:\\Python35-x64"
-  - PYTHON: "C:\\Python36-x64"
+#    - PYTHON: "C:\\Python36-x64"
+    - PYTHON: C:\Python36-x64
+      PYTHON_VERSION: 3.6
+      PYTHON_ARCH: 64
+      TEST_MODE: full
+
+    - PYTHON: C:\Python37-x64
+      PYTHON_VERSION: 3.7
+      PYTHON_ARCH: 64
+      TEST_MODE: full
 
     #init:
     #    - ps: iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
@@ -27,61 +40,65 @@ environment:
     #on_finish:
     #    - ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
     #
+
+# cache to build faster
+cache:
+  - build/tdm64-core.tar.lzma
+  - build/tdm64-binutils.tar.lzma
+  - build/tdm64-mingw64runtime.tar.lzma
+  - build/tdm64-cpp.tar.lzma
+  - '%LOCALAPPDATA%\pip\Cache'
+
 install:
-- cmd: git submodule init
-- cmd: git submodule update
-- cmd: cd gopath/src/github.com/skycoin/skycoin
-- cmd: git checkout origin/stdevEclipse_t1568_swig_files
-- cmd: git pull origin stdevEclipse_t1568_swig_files
-- cmd: cd C:\projects\pyskycoin
-- cmd: curl -fsSL -o swigwin-3.0.12.zip "https://downloads.sourceforge.net/project/swig/swigwin/swigwin-3.0.12/swigwin-3.0.12.zip?r=https%3A%2F%2Fsourceforge.net%2Fprojects%2Fswig%2Ffiles%2Fswigwin%2Fswigwin-3.0.12%2Fswigwin-3.0.12.zip%2Fdownload%3Fuse_mirror%3Dayera&ts=1531774939"
-- cmd: 7z x swigwin-3.0.12.zip
-- ps: >-
-    if (-Not (Test-Path "$pwd/build/tdm64-cpp.tar.lzma")) {
+  - set PATH=%CYGWIN_64%\bin;c:\go\bin;%PATH%
+  - cmd: git submodule init
+  - cmd: git submodule update
+  - cmd: cd gopath/src/github.com/skycoin/skycoin
+  - cmd: git checkout origin/stdevEclipse_t1568_swig_files
+  - cmd: git pull origin stdevEclipse_t1568_swig_files
+  - cmd: cd C:\projects\pyskycoin
+  - cmd: curl -fsSL -o swigwin-3.0.12.zip "https://downloads.sourceforge.net/project/swig/swigwin/swigwin-3.0.12/swigwin-3.0.12.zip?r=https%3A%2F%2Fsourceforge.net%2Fprojects%2Fswig%2Ffiles%2Fswigwin%2Fswigwin-3.0.12%2Fswigwin-3.0.12.zip%2Fdownload%3Fuse_mirror%3Dayera&ts=1531774939"
+  - cmd: 7z x swigwin-3.0.12.zip
+  - ps: >-
+      if (-Not (Test-Path "$pwd/build/tdm64-cpp.tar.lzma")) {
 
-        echo "TDM-GCC64 not found on build/, downloading..."
+          echo "TDM-GCC64 not found on build/, downloading..."
 
-        md -Force build | Out-Null
-        md -Force C:/tools/tdm64 | Out-Null
+          md -Force build | Out-Null
+          md -Force C:/tools/tdm64 | Out-Null
 
-        echo "Downloading tdm64-core..."
-        (New-Object Net.WebClient).DownloadFile("https://downloads.sourceforge.net/project/tdm-gcc/TDM-GCC%205%20series/5.1.0-tdm64-1/gcc-5.1.0-tdm64-1-core.tar.lzma", "$pwd/build/tdm64-core.tar.lzma")
+          echo "Downloading tdm64-core..."
+          (New-Object Net.WebClient).DownloadFile("https://downloads.sourceforge.net/project/tdm-gcc/TDM-GCC%205%20series/5.1.0-tdm64-1/gcc-5.1.0-tdm64-1-core.tar.lzma", "$pwd/build/tdm64-core.tar.lzma")
 
-        echo "Downloading tdm64-binutils..."
-        (New-Object Net.WebClient).DownloadFile("https://downloads.sourceforge.net/project/tdm-gcc/GNU%20binutils/binutils-2.25-tdm64-1.tar.lzma", "$pwd/build/tdm64-binutils.tar.lzma")
+          echo "Downloading tdm64-binutils..."
+          (New-Object Net.WebClient).DownloadFile("https://downloads.sourceforge.net/project/tdm-gcc/GNU%20binutils/binutils-2.25-tdm64-1.tar.lzma", "$pwd/build/tdm64-binutils.tar.lzma")
 
-        echo "Downloading tdm64-mingw64runtime..."
-        (New-Object Net.WebClient).DownloadFile("https://downloads.sourceforge.net/project/tdm-gcc/MinGW-w64%20runtime/GCC%205%20series/mingw64runtime-v4-git20150618-gcc5-tdm64-1.tar.lzma", "$pwd/build/tdm64-mingw64runtime.tar.lzma")
+          echo "Downloading tdm64-mingw64runtime..."
+          (New-Object Net.WebClient).DownloadFile("https://downloads.sourceforge.net/project/tdm-gcc/MinGW-w64%20runtime/GCC%205%20series/mingw64runtime-v4-git20150618-gcc5-tdm64-1.tar.lzma", "$pwd/build/tdm64-mingw64runtime.tar.lzma")
 
-        echo "Downloading tdm64-cpp..."
-        (New-Object Net.WebClient).DownloadFile("https://downloads.sourceforge.net/project/tdm-gcc/TDM-GCC%205%20series/5.1.0-tdm64-1/gcc-5.1.0-tdm64-1-c%2B%2B.tar.lzma", "$pwd/build/tdm64-cpp.tar.lzma")
-    }
-- cmd: 7z x "%cd%/build/tdm64-core.tar.lzma" -y "-o%cd%/build" >nul
-- cmd: 7z x "%cd%/build/tdm64-core.tar" -y "-oC:/tools/tdm64" >nul
-- cmd: 7z x "%cd%/build/tdm64-binutils.tar.lzma" -y "-o%cd%/build" >nul
-- cmd: 7z x "%cd%/build/tdm64-binutils.tar" -y "-oC:/tools/tdm64" >nul
-- cmd: 7z x "%cd%/build/tdm64-mingw64runtime.tar.lzma" -y "-o%cd%/build" >nul
-- cmd: 7z x "%cd%/build/tdm64-mingw64runtime.tar" -y "-oC:/tools/tdm64" >nul
-- cmd: 7z x "%cd%/build/tdm64-cpp.tar.lzma" -y "-o%cd%/build" >nul
-- cmd: 7z x "%cd%/build/tdm64-cpp.tar" -y "-oC:/tools/tdm64" >nul
-  #- ps: echo "@echo off`n%PYTHON%\\python.exe %*" | Out-File -Encoding ascii "C:/Tools/tdm64/bin/python34.bat"
-  #- ps: echo "@echo off`n%c:\projects\pyskycoin\swigwin-3.0.12\swig.exe %*" | Out-File -Encoding ascii "C:\msys64\usr\bin\swig.bat"
-  #- ps: echo "[build]`ncompiler=mingw32`n[build_ext]`ncompiler=mingw32" | Out-File -Encoding ascii "C:/Python34-x64/Lib/distutils/distutils.cfg"
-- cmd: "%PYTHON%\\python.exe -m pip install --upgrade setuptools tox wheel pip"
-- cmd: set PATH=c:\projects\pyskycoin\swigwin-3.0.12;%PYTHON%\\Scripts;%PATH%
-- cmd: call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
-- cmd: swig -version
+          echo "Downloading tdm64-cpp..."
+          (New-Object Net.WebClient).DownloadFile("https://downloads.sourceforge.net/project/tdm-gcc/TDM-GCC%205%20series/5.1.0-tdm64-1/gcc-5.1.0-tdm64-1-c%2B%2B.tar.lzma", "$pwd/build/tdm64-cpp.tar.lzma")
+      }
+  - cmd: 7z x "%cd%/build/tdm64-core.tar.lzma" -y "-o%cd%/build" >nul
+  - cmd: 7z x "%cd%/build/tdm64-core.tar" -y "-oC:/tools/tdm64" >nul
+  - cmd: 7z x "%cd%/build/tdm64-binutils.tar.lzma" -y "-o%cd%/build" >nul
+  - cmd: 7z x "%cd%/build/tdm64-binutils.tar" -y "-oC:/tools/tdm64" >nul
+  - cmd: 7z x "%cd%/build/tdm64-mingw64runtime.tar.lzma" -y "-o%cd%/build" >nul
+  - cmd: 7z x "%cd%/build/tdm64-mingw64runtime.tar" -y "-oC:/tools/tdm64" >nul
+  - cmd: 7z x "%cd%/build/tdm64-cpp.tar.lzma" -y "-o%cd%/build" >nul
+  - cmd: 7z x "%cd%/build/tdm64-cpp.tar" -y "-oC:/tools/tdm64" >nul
+    #- ps: echo "@echo off`n%PYTHON%\\python.exe %*" | Out-File -Encoding ascii "C:/Tools/tdm64/bin/python34.bat"
+    #- ps: echo "@echo off`n%c:\projects\pyskycoin\swigwin-3.0.12\swig.exe %*" | Out-File -Encoding ascii "C:\msys64\usr\bin\swig.bat"
+    #- ps: echo "[build]`ncompiler=mingw32`n[build_ext]`ncompiler=mingw32" | Out-File -Encoding ascii "C:/Python34-x64/Lib/distutils/distutils.cfg"
+  - cmd: "%PYTHON%\\python.exe -m pip install --upgrade setuptools tox wheel pip"
+  - cmd: set PATH=c:\projects\pyskycoin\swigwin-3.0.12;%PYTHON%\\Scripts;%PATH%
+  - cmd: call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
+  - cmd: swig -version
 
 build: off
 
 deploy: off
 
-cache:
-- build/tdm64-core.tar.lzma
-- build/tdm64-binutils.tar.lzma
-- build/tdm64-mingw64runtime.tar.lzma
-- build/tdm64-cpp.tar.lzma
-
 test_script:
-- "%PYTHON%\\python.exe -m tox"
-#- "build.cmd %PYTHON%\\python.exe -m tox"
+  - "%PYTHON%\\python.exe -m tox"
+#  - "build.cmd %PYTHON%\\python.exe -m tox"