diff --git a/src/modpack.json b/src/modpack.json
index db96c52..d74fadd 100644
--- a/src/modpack.json
+++ b/src/modpack.json
@@ -2431,6 +2431,21 @@
             "included"
           ]
         },
+        {
+          "id": "mod-polymorph",
+          "file": {
+            "installer": "internal.dir:mods",
+            "artifact": "curse.maven:388800:4632727",
+            "repository": "curse"
+          },
+          "type": "mod",
+          "options": [
+            "server",
+            "client",
+            "required",
+            "included"
+          ]
+        },
         {
           "id": "mod-steampowered",
           "file": {