diff --git a/gleam.toml.schema.json b/gleam.toml.schema.json
index 9d60b61..3f8e7e4 100644
--- a/gleam.toml.schema.json
+++ b/gleam.toml.schema.json
@@ -129,7 +129,7 @@
                                 }
                             },
                             "required": ["path"],
-                            "additionalItems": false,
+                            "additionalProperties": false,
                             "examples": [{ "path": "../my_other_project" }]
                         },
                         {
@@ -151,7 +151,7 @@
                                 }
                             },
                             "required": ["git", "ref"],
-                            "additionalItems": false,
+                            "additionalProperties": false,
                             "examples": [
                                 { "git": "git@github.com:my-project/my-library.git", "ref": "main" },
                                 { "git": "git@github.com:gleam-lang/stdlib.git", "ref": "a8b3c5d82" }
@@ -202,7 +202,7 @@
                                 }
                             },
                             "required": ["path"],
-                            "additionalItems": false,
+                            "additionalProperties": false,
                             "examples": [{ "path": "../my_other_project" }]
                         },
                         {
@@ -221,7 +221,7 @@
                                 }
                             },
                             "required": ["git", "ref"],
-                            "additionalItems": false,
+                            "additionalProperties": false,
                             "examples": [{ "git": "git@github.com:my-project/my-testing-library.git", "ref": "main" }]
                         }
                     ],
@@ -311,7 +311,7 @@
                         }
                     },
                     "required": ["type", "host", "user", "repo"],
-                    "additionalItems": false,
+                    "additionalProperties": false,
                     "examples": [
                         { "type": "forgejo", "host": "example.com", "user": "example", "repo": "my_project" },
                         { "type": "gitea", "host": "example.com", "user": "example", "repo": "my_project" }
@@ -338,7 +338,7 @@
                         }
                     },
                     "required": ["type", "url"],
-                    "additionalItems": false,
+                    "additionalProperties": false,
                     "examples": [{ "type": "custom", "url": "https://example.com/my_project" }]
                 }
             ],