diff --git a/extensions/configuration-editing/schemas/attachContainer.schema.json b/extensions/configuration-editing/schemas/attachContainer.schema.json
index c5d46bb836f..8ecc9e76054 100644
--- a/extensions/configuration-editing/schemas/attachContainer.schema.json
+++ b/extensions/configuration-editing/schemas/attachContainer.schema.json
@@ -42,7 +42,7 @@
 					"description": "An array of extensions that should be installed into the container.",
 					"items": {
 						"type": "string",
-						"pattern": "^([a-z0-9A-Z][a-z0-9\\-A-Z]*)\\.([a-z0-9A-Z][a-z0-9\\-A-Z]*)$",
+						"pattern": "^([a-z0-9A-Z][a-z0-9\\-A-Z]*)\\.([a-z0-9A-Z][a-z0-9\\-A-Z]*)(@[0-9]+\\.[0-9]+\\.[0-9]+)?$",
 						"errorMessage": "Expected format '${publisher}.${name}'. Example: 'vscode.csharp'."
 					}
 				},
diff --git a/extensions/configuration-editing/schemas/devContainer.schema.json b/extensions/configuration-editing/schemas/devContainer.schema.json
index abf7469d356..e55f1e779dc 100644
--- a/extensions/configuration-editing/schemas/devContainer.schema.json
+++ b/extensions/configuration-editing/schemas/devContainer.schema.json
@@ -17,7 +17,7 @@
 					"description": "An array of extensions that should be installed into the container.",
 					"items": {
 						"type": "string",
-						"pattern": "^([a-z0-9A-Z][a-z0-9\\-A-Z]*)\\.([a-z0-9A-Z][a-z0-9\\-A-Z]*)$",
+						"pattern": "^([a-z0-9A-Z][a-z0-9\\-A-Z]*)\\.([a-z0-9A-Z][a-z0-9\\-A-Z]*)(@[0-9]+\\.[0-9]+\\.[0-9]+)?$",
 						"errorMessage": "Expected format '${publisher}.${name}'. Example: 'vscode.csharp'."
 					}
 				},