diff --git a/scripts/generate-http-docs.ps1 b/scripts/generate-http-docs.ps1
index 8ea907d..c463f4a 100644
--- a/scripts/generate-http-docs.ps1
+++ b/scripts/generate-http-docs.ps1
@@ -1,3 +1,5 @@
+#requires -Modules powershell-yaml
+
 param(
     [string]$StartDir = (Split-Path -Parent $MyInvocation.MyCommand.Path)
 )