diff --git a/appveyor.yml b/appveyor.yml
index d42cd5f6..10365519 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,12 +1,12 @@
 version: '{build}'
 image: Visual Studio 2017
 clone_depth: 1
+init:
+  - git submodule update --init --recursive
 build_script:
 - ps: >-
-    cd ref
-    
-    git clone "https://github.com/chriskohlhoff/asio" --depth 1 --branch asio-1-16-1 -q
-    
+  cd ref
+  
     curl -o crashpad86.zip "http://get.backtrace.io/crashpad/builds/release/x86/crashpad-2020-07-01-release-x86-558c9614e3819179f30b92541450f5ac643afce5.zip"
     
     7z x crashpad86.zip