diff --git a/appveyor.yml b/appveyor.yml
line changes: +1/-0
index af3142a..43552b3
--- a/appveyor.yml
+++ b/appveyor.yml

@@ -107,6 +107,7 @@ install:
   - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
   - rustc -vV
   - cargo -vV
+  - git submodule update --init --recursive
 
 ## Build Script ##