diff --git a/src/Qir/Runtime/prerequisites.ps1 b/src/Qir/Runtime/prerequisites.ps1
index 35e9b351aba..9e704cde689 100644
--- a/src/Qir/Runtime/prerequisites.ps1
+++ b/src/Qir/Runtime/prerequisites.ps1
@@ -4,7 +4,7 @@
 if ($Env:ENABLE_QIRRUNTIME -ne "false") {
     if (($IsWindows) -or ((Test-Path Env:AGENT_OS) -and ($Env:AGENT_OS.StartsWith("Win")))) {
         if (!(Get-Command clang -ErrorAction SilentlyContinue)) {
-            choco install llvm
+            choco install llvm --version=11.1.0
             choco install ninja
         }
     } elseif ($IsMacOS) {