diff --git a/elm.json b/elm.json
index 85296a19..64b4bde8 100644
--- a/elm.json
+++ b/elm.json
@@ -83,9 +83,10 @@
         "pablohirafuji/elm-markdown": "2.0.5 <= v < 3.0.0",
         "rtfeldman/elm-css": "16.0.0 <= v < 17.0.0",
         "tesk9/accessible-html": "4.0.0 <= v < 5.0.0",
+        "tesk9/modal": "1.0.0 <= v < 2.0.0",
         "wernerdegroot/listzipper": "3.1.1 <= v < 4.0.0"
     },
     "test-dependencies": {
         "elm-explorations/test": "1.2.0 <= v < 2.0.0"
     }
-}
+}
\ No newline at end of file
diff --git a/styleguide-app/elm.json b/styleguide-app/elm.json
index 9095021d..64b9f4ee 100644
--- a/styleguide-app/elm.json
+++ b/styleguide-app/elm.json
@@ -22,6 +22,7 @@
             "pablohirafuji/elm-markdown": "2.0.5",
             "rtfeldman/elm-css": "16.0.0",
             "tesk9/accessible-html": "4.0.0",
+            "tesk9/modal": "1.0.0",
             "wernerdegroot/listzipper": "3.2.0"
         },
         "indirect": {