diff --git a/lib/rules/method.js b/lib/rules/method.js
index 45c5020..0e2a868 100644
--- a/lib/rules/method.js
+++ b/lib/rules/method.js
@@ -182,6 +182,7 @@ module.exports = {
                                 items: [{ type: "string" }],
                             },
                         },
+                        additionalProperties: false,
                     },
                     objectMatches: {
                         type: "array",
diff --git a/lib/rules/property.js b/lib/rules/property.js
index 08f9883..4ce9b79 100644
--- a/lib/rules/property.js
+++ b/lib/rules/property.js
@@ -44,6 +44,7 @@ module.exports = {
                                 items: [{ type: "string" }],
                             },
                         },
+                        additionalProperties: false,
                     },
                     variableTracing: { type: "boolean" },
                 },