diff --git a/manifests/m/ManifoldSoftware/Manifold-Release-9/9.0.173/ManifoldSoftware.Manifold-Release-9.yaml b/manifests/m/ManifoldSoftware/Manifold-Release-9/9.0.173/ManifoldSoftware.Manifold-Release-9.yaml
index 1240f4e99..1b4cc2aa1 100644
--- a/manifests/m/ManifoldSoftware/Manifold-Release-9/9.0.173/ManifoldSoftware.Manifold-Release-9.yaml
+++ b/manifests/m/ManifoldSoftware/Manifold-Release-9/9.0.173/ManifoldSoftware.Manifold-Release-9.yaml
@@ -15,7 +15,7 @@ Tags:
 PackageUrl: http://manifold.net/
 Installers:
 - Architecture: x64
-  InstallerUrl: http://www.manifoldgis.com/updates/manifold-9.0.173-x64.exe
+  InstallerUrl: https://www.manifoldgis.com/updates/manifold-9.0.173-x64.exe
   InstallerSha256: 7b4ef95513109f4fbc4d3a1552626924df0b768c7e301f190a719c4fa30f15ce
   InstallerType: exe
   InstallerSwitches: