diff --git a/manifests/m/ManifoldSoftware/Manifold-Viewer-Release-9/9.0.173/ManifoldSoftware.Manifold-Viewer-Release-9.yaml b/manifests/m/ManifoldSoftware/Manifold-Viewer-Release-9/9.0.173/ManifoldSoftware.Manifold-Viewer-Release-9.yaml
index 3caff02ce..4d16a0ccd 100644
--- a/manifests/m/ManifoldSoftware/Manifold-Viewer-Release-9/9.0.173/ManifoldSoftware.Manifold-Viewer-Release-9.yaml
+++ b/manifests/m/ManifoldSoftware/Manifold-Viewer-Release-9/9.0.173/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-9.0.173-x64.exe
+  InstallerUrl: https://www.manifoldgis.com/updates/manifold-viewer-9.0.173-x64.exe
   InstallerSha256: 9dcf19d89eb5dcccc3ab08c0fd662a03947efe09a8f647d4947ca7828cf21c68
   InstallerType: exe
   InstallerSwitches: