diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 1fb2f9d..3b6d0e8 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -1,5 +1,5 @@
 pool:
-  vmImage: 'ubuntu-18.04'
+  vmImage: 'ubuntu-16.04'
 container: 'rust:latest'
 steps:
   - script: cargo check --all