diff --git a/config/yigd.json b/config/yigd.json
new file mode 100644
index 0000000..27df118
--- /dev/null
+++ b/config/yigd.json
@@ -0,0 +1,6 @@
+{
+  "expConfig": {
+    "dropBehaviour": "BEST_OF_BOTH",
+    "dropPercentage": "40",
+  },
+}
diff --git a/index.toml b/index.toml
index 0b9f498..4ff756b 100644
--- a/index.toml
+++ b/index.toml
@@ -1,5 +1,9 @@
 hash-format = "sha256"
 
+[[files]]
+file = "config/yigd.json"
+hash = "8aa2776935f1a2c7775d8dd49e328347a2e6118f05a9f433f8cb71153699c693"
+
 [[files]]
 file = "mods/appleskin.pw.toml"
 hash = "e3dfb2478e6bb096667d4ec89b0ddfef627747939373bdefee02f358d6e3dee1"
diff --git a/pack.toml b/pack.toml
index 2eb0a20..c7f7c95 100644
--- a/pack.toml
+++ b/pack.toml
@@ -6,7 +6,7 @@ pack-format = "packwiz:1.1.0"
 [index]
 file = "index.toml"
 hash-format = "sha256"
-hash = "f57a9e384a944e9ea84001ae2a27d0221474c95bffbf8d45accb64dd143fe961"
+hash = "b7cb4a2638505c1b09f59d02a21986f93a030db7a91b791ad7398fd92e536198"
 
 [versions]
 fabric = "0.16.10"