Disable revocation checking temporarily
diff --git a/appveyor.yml b/appveyor.yml
index b58168c..22ef8a5 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -4,6 +4,7 @@
   # switch to turn this off. Switch to Hyper which looks to not check for
   # revocation by default like libcurl does.
   RUSTUP_USE_HYPER: 1
+  CARGO_HTTP_CHECK_REVOKE: false
   matrix:
   - TARGET: x86_64-pc-windows-gnu
     MSYS2_BITS: 64