diff --git a/appveyor.yml b/appveyor.yml
index 502474c..7507895 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,6 +3,10 @@ environment:
     - GENERATOR: "Visual Studio 12"
       CONFIG: Debug
 
+install:
+  - git submodule init
+  - git submodule update
+
 build_script:
   - mkdir build
   - cd build