diff --git a/.appveyor.yml b/.appveyor.yml
index 0e70e8a..b998363 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -1,3 +1,5 @@
+services:
+  - mongodb
 environment:
   RUST_BACKTRACE: 1
   OPENSSL_DIR: C:\Tools\vcpkg\packages\openssl-windows_x64-windows