diff --git a/elm.json b/elm.json
index b89017f7..dbea64d4 100644
--- a/elm.json
+++ b/elm.json
@@ -84,6 +84,7 @@
     },
     "test-dependencies": {
         "avh4/elm-program-test": "3.3.0 <= v < 4.0.0",
-        "elm-explorations/test": "1.2.2 <= v < 2.0.0"
+        "elm-explorations/test": "1.2.2 <= v < 2.0.0",
+        "tesk9/accessible-html": "4.1.0 <= v < 5.0.0"
     }
 }