diff --git a/appveyor.yml b/appveyor.yml
index a7158521ee..63c28fc3e0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -17,7 +17,7 @@ artifacts:
 - path: MD5-SHA1-Client-v*.txt
   name: MD5SHA1Client
 install:
-  - choco install fciv doxygen.portable graphviz
+  - choco install fciv doxygen.portable graphviz.portable
 before_build:
   - nuget restore TGStationServer3.sln
 build: