diff --git a/.azure/azure-linux-template.yml b/.azure/azure-linux-template.yml
index cdebadb..8b83a12 100644
--- a/.azure/azure-linux-template.yml
+++ b/.azure/azure-linux-template.yml
@@ -11,6 +11,7 @@ jobs:
       curl -L https://get.haskellstack.org/stable/linux-x86_64.tar.gz | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
       export PATH=$HOME/.local/bin:$PATH
 
+      sudo apt-get update
       sudo apt-get install libpq-dev
 
       stack test --interleaved-output