diff --git a/packages/block-library/src/column/block.json b/packages/block-library/src/column/block.json
index 1a1513ad2e66c3..826b916811cadc 100644
--- a/packages/block-library/src/column/block.json
+++ b/packages/block-library/src/column/block.json
@@ -17,6 +17,7 @@
 			"type": "array"
 		},
 		"templateLock": {
+			"type": "string",
 			"enum": [ "all", "insert", false ]
 		}
 	},
diff --git a/packages/block-library/src/cover/block.json b/packages/block-library/src/cover/block.json
index ecb8227079c158..cac312ec13386c 100644
--- a/packages/block-library/src/cover/block.json
+++ b/packages/block-library/src/cover/block.json
@@ -67,6 +67,7 @@
 			"type": "array"
 		},
 		"templateLock": {
+			"type": "string",
 			"enum": [ "all", "insert", false ]
 		}
 	},
diff --git a/packages/block-library/src/group/block.json b/packages/block-library/src/group/block.json
index 5e182cd0e9cba9..c10790d28c427c 100644
--- a/packages/block-library/src/group/block.json
+++ b/packages/block-library/src/group/block.json
@@ -12,6 +12,7 @@
 			"default": "div"
 		},
 		"templateLock": {
+			"type": "string",
 			"enum": [ "all", "insert", false ]
 		}
 	},