diff --git a/appveyor.yml b/appveyor.yml
index 424d9c4d..71e91aa1 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,6 +1,11 @@
+install:
+  - appveyor DownloadFile http://slproweb.com/download/Win32OpenSSL-1_0_1L.exe
+  - Win32OpenSSL-1_0_1L.exe /silent /verysilent /sp- /suppressmsgboxes
 build_script:
   - md build
   - cd build
   - cmake ..
   - cmake --build .
   - ctest --output-on-failure
+cache:
+  - C:\OpenSSL-Win32