diff --git a/manifests/m/ManifoldSoftware/Manifold-Viewer-Release-9/9.0.174/ManifoldSoftware.Manifold-Viewer-Release-9.yaml b/manifests/m/ManifoldSoftware/Manifold-Viewer-Release-9/9.0.174/ManifoldSoftware.Manifold-Viewer-Release-9.yaml
index c5f38cf0a..7ec58fec1 100644
--- a/manifests/m/ManifoldSoftware/Manifold-Viewer-Release-9/9.0.174/ManifoldSoftware.Manifold-Viewer-Release-9.yaml
+++ b/manifests/m/ManifoldSoftware/Manifold-Viewer-Release-9/9.0.174/ManifoldSoftware.Manifold-Viewer-Release-9.yaml
@@ -15,7 +15,7 @@ Tags:
 PackageUrl: http://manifold.net/
 Installers:
 - Architecture: x64
-  InstallerUrl: http://www.manifoldgis.com/updates/manifold-viewer-9.0.174-x64.exe
+  InstallerUrl: https://www.manifoldgis.com/updates/manifold-viewer-9.0.174-x64.exe
   InstallerSha256: f663b427ad5200293ce1e27bb78d431a62d913327d2c592f243b9c664e5b8015
   InstallerType: exe
   InstallerSwitches: