diff --git a/content/draft4/validation/dependencies.markdown b/content/draft4/validation/dependencies.markdown
index 96d4c51..45699e0 100644
--- a/content/draft4/validation/dependencies.markdown
+++ b/content/draft4/validation/dependencies.markdown
@@ -12,7 +12,9 @@ default:
 index: -3
 tests:
   - draft4/dependencies.json
-introduced_in: 2019-09
+introduced_in: draft3
+changed_in:
+  - 2019-09
 related:
   - vocabulary: validation
     keyword: required
diff --git a/content/draft4/validation/exclusiveMaximum.markdown b/content/draft4/validation/exclusiveMaximum.markdown
index 9017988..2b78bcc 100644
--- a/content/draft4/validation/exclusiveMaximum.markdown
+++ b/content/draft4/validation/exclusiveMaximum.markdown
@@ -13,6 +13,8 @@ default:
 tests:
   - draft4/maximum.json
 introduced_in: draft3
+changed_in:
+  - draft6
 index: -9997
 affects:
   - vocabulary: validation
diff --git a/content/draft4/validation/exclusiveMinimum.markdown b/content/draft4/validation/exclusiveMinimum.markdown
index 17ec2ec..92cfce5 100644
--- a/content/draft4/validation/exclusiveMinimum.markdown
+++ b/content/draft4/validation/exclusiveMinimum.markdown
@@ -12,6 +12,8 @@ default:
 tests:
   - draft4/minimum.json
 introduced_in: draft3
+changed_in:
+  - draft6
 index: -9995
 affects:
   - vocabulary: validation
diff --git a/content/draft4/validation/items.markdown b/content/draft4/validation/items.markdown
index e3876c5..98b3192 100644
--- a/content/draft4/validation/items.markdown
+++ b/content/draft4/validation/items.markdown
@@ -12,6 +12,8 @@ default:
 tests:
   - draft4/items.json
 introduced_in: draft1
+changed_in:
+  - 2020-12
 index: -99
 interdependencies:
   - vocabulary: validation