diff --git a/schema.json b/schema.json
index 7104d11..05f142b 100644
--- a/schema.json
+++ b/schema.json
@@ -209,35 +209,39 @@
           ]
         },
         "sections": {
-          "additionalProperties": {
-            "items": {
-              "anyOf": [
-                {
-                  "$ref": "#/$defs/EducationEntry"
-                },
-                {
-                  "$ref": "#/$defs/ExperienceEntry"
-                },
-                {
-                  "$ref": "#/$defs/PublicationEntry"
-                },
-                {
-                  "$ref": "#/$defs/NormalEntry"
-                },
-                {
-                  "$ref": "#/$defs/OneLineEntry"
-                },
-                {
-                  "type": "string"
-                }
-              ]
-            },
-            "type": "array"
-          },
           "default": null,
           "description": "The sections of the CV.",
           "title": "Sections",
-          "type": "object"
+          "allOf": [
+            {
+              "additionalProperties": {
+                "items": {
+                  "anyOf": [
+                    {
+                      "$ref": "#/$defs/EducationEntry"
+                    },
+                    {
+                      "$ref": "#/$defs/ExperienceEntry"
+                    },
+                    {
+                      "$ref": "#/$defs/PublicationEntry"
+                    },
+                    {
+                      "$ref": "#/$defs/NormalEntry"
+                    },
+                    {
+                      "$ref": "#/$defs/OneLineEntry"
+                    },
+                    {
+                      "type": "string"
+                    }
+                  ]
+                },
+                "type": "array"
+              },
+              "type": "object"
+            }
+          ]
         }
       },
       "required": [