diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 659ba152a..052f76c62 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -4,7 +4,7 @@ pool:
 steps:
   - script: |
       echo "CPUS='$CPUS' PLATFORMS='$PLATFORMS' TARGETS='$TARGETS' FIRMWARE='$FIRMWARE'"
-      sudo apt-get install bc flex
+      sudo apt-get install bc bison flex
       ./.travis/setup.sh
     displayName: Setup
     env: