diff --git a/src/rules/alt-text.ts b/src/rules/alt-text.ts
index d2b9e05f..c0d6e2d5 100644
--- a/src/rules/alt-text.ts
+++ b/src/rules/alt-text.ts
@@ -91,7 +91,8 @@ const rule: Rule.RuleModule = {
               }
             }),
           {}
-        )
+        ),
+        additionalProperties: false
       }
     ]
   },
diff --git a/src/rules/anchor-has-content.ts b/src/rules/anchor-has-content.ts
index 104920b7..af86b662 100644
--- a/src/rules/anchor-has-content.ts
+++ b/src/rules/anchor-has-content.ts
@@ -35,7 +35,8 @@ const rule: Rule.RuleModule = {
             type: "array",
             items: { type: "string" }
           }
-        }
+        },
+        additionalProperties: false
       }
     ]
   },
diff --git a/src/rules/form-control-has-label.ts b/src/rules/form-control-has-label.ts
index 55ab71ec..e2bcb144 100644
--- a/src/rules/form-control-has-label.ts
+++ b/src/rules/form-control-has-label.ts
@@ -83,7 +83,8 @@ const rule: Rule.RuleModule = {
             },
             uniqueItems: true
           }
-        }
+        },
+        additionalProperties: false
       }
     ]
   },
diff --git a/src/rules/heading-has-content.ts b/src/rules/heading-has-content.ts
index db6bd616..b81c5308 100644
--- a/src/rules/heading-has-content.ts
+++ b/src/rules/heading-has-content.ts
@@ -36,7 +36,8 @@ const rule: Rule.RuleModule = {
             type: "array",
             items: { type: "string" }
           }
-        }
+        },
+        additionalProperties: false
       }
     ]
   },
diff --git a/src/rules/interactive-supports-focus.ts b/src/rules/interactive-supports-focus.ts
index d3871ff6..95ba4a19 100644
--- a/src/rules/interactive-supports-focus.ts
+++ b/src/rules/interactive-supports-focus.ts
@@ -108,7 +108,8 @@ const rule: InteractiveSupportsFocus = {
             uniqueItems: true,
             additionalItems: false
           }
-        }
+        },
+        additionalProperties: false
       }
     ]
   },
diff --git a/src/rules/label-has-for.ts b/src/rules/label-has-for.ts
index 2af4c386..de99d00a 100644
--- a/src/rules/label-has-for.ts
+++ b/src/rules/label-has-for.ts
@@ -116,7 +116,8 @@ const rule: Rule.RuleModule = {
                     uniqueItems: true
                   }
                 },
-                required: ["some"]
+                required: ["some"],
+                additionalProperties: false
               },
               {
                 type: "object",
@@ -130,14 +131,16 @@ const rule: Rule.RuleModule = {
                     uniqueItems: true
                   }
                 },
-                required: ["every"]
+                required: ["every"],
+                additionalProperties: false
               }
             ]
           },
           allowChildren: {
             type: "boolean"
           }
-        }
+        },
+        additionalProperties: false
       }
     ]
   },
diff --git a/src/rules/media-has-caption.ts b/src/rules/media-has-caption.ts
index 5d544683..c5cb1824 100644
--- a/src/rules/media-has-caption.ts
+++ b/src/rules/media-has-caption.ts
@@ -46,7 +46,8 @@ const rule: Rule.RuleModule = {
             type: "array",
             items: { type: "string" }
           }
-        }
+        },
+        additionalProperties: false
       }
     ]
   },
diff --git a/src/rules/no-distracting-elements.ts b/src/rules/no-distracting-elements.ts
index cd13969c..43169a71 100644
--- a/src/rules/no-distracting-elements.ts
+++ b/src/rules/no-distracting-elements.ts
@@ -22,7 +22,7 @@ const rule: Rule.RuleModule = {
     schema: [
       {
         type: "object",
-        elements: {
+        additionalProperties: {
           type: "array",
           items: {
             type: "string",