diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index e93aafd46..04e806d5f 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -38,6 +38,8 @@ jobs:
 - job: wasi
   steps:
     - template: ci/azure-install-rust.yml
+      parameters:
+        toolchain: nightly
     - script: rustup target add wasm32-unknown-wasi
     - script: cargo build --target wasm32-unknown-wasi
 - job: rust_backend