diff --git a/acmc/phen.py b/acmc/phen.py
index f55111317299e2241002a598111e1c332d7f7c57..ff2edc2b3bb8859b1c2fe63cb27cdb297da51178 100644
--- a/acmc/phen.py
+++ b/acmc/phen.py
@@ -127,22 +127,25 @@ CONFIG_SCHEMA = {
                     "type": "dict",
                     "schema": {
                         "name": {"type": "string", "required": True},
-                        "file": {
-                            "type": "dict",
-                            "required": False,
-                            "schema": {
-                                "path": {"type": "string", "required": True},
-                                "columns": {"type": "dict", "required": True},
-                                "category": {
-                                    "type": "string"
-                                },  # Optional but must be string if present
-                                "actions": {
-                                    "type": "dict",
-                                    "schema": {"divide_col": {"type": "string"}},
+                        "files":{
+                            "type": "list",
+                            "required": True, 
+                            "schema":{
+                                "type": "dict",
+                                "schema": {
+                                    "path": {"type": "string", "required": True},
+                                    "columns": {"type": "dict", "required": True},
+                                    "category": {
+                                        "type": "string"
+                                    },  # Optional but must be string if present
+                                    "actions": {
+                                        "type": "dict",
+                                        "schema": {"divide_col": {"type": "string"}},
+                                    },
                                 },
-                            },
+                                # "metadata": {"type": "dict", "required": True},
+                            }
                         },
-                        "metadata": {"type": "dict", "required": True},
                     },
                 },
             },