diff --git a/appveyor.yml b/appveyor.yml
index edb85446..423714e7 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -28,6 +28,8 @@ environment:
 
 
 install:
+  - git submodule init
+  - git submodule update
   - cmd: '%APPVEYOR_BUILD_FOLDER%\.appveyor\Install.bat'
   - sh: '${APPVEYOR_BUILD_FOLDER}/.appveyor/Install.sh'