diff --git a/docs/release-notes.md b/docs/release-notes.md
index 4daf97ce..075ec6b4 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -21,6 +21,9 @@
   * Adjusted `ModContentManager.HandleUnknownFileType` to let mods patch it.
   * Fixed `Context.IsWorldReady` being editable by mods.
 
+* For the web UI:
+  * Updated the JSON validator/schema for Content Patcher 1.29.0.
+
 ## 3.18.2
 Released 09 January 2023 for Stardew Valley 1.5.6 or later.
 
diff --git a/src/SMAPI.Web/wwwroot/schemas/content-patcher.json b/src/SMAPI.Web/wwwroot/schemas/content-patcher.json
index a00403c0..bd9e7427 100644
--- a/src/SMAPI.Web/wwwroot/schemas/content-patcher.json
+++ b/src/SMAPI.Web/wwwroot/schemas/content-patcher.json
@@ -14,9 +14,9 @@
             "title": "Format version",
             "description": "The format version. You should always use the latest version to enable the latest features, avoid obsolete behavior, and reduce load times.",
             "type": "string",
-            "pattern": "^1\\.28\\.[0-9]+$",
+            "pattern": "^1\\.29\\.[0-9]+$",
             "@errorMessages": {
-                "pattern": "Incorrect value '@value'. You should always use the latest format version (currently 1.28.0) to enable the latest features, avoid obsolete behavior, and reduce load times."
+                "pattern": "Incorrect value '@value'. You should always use the latest format version (currently 1.29.0) to enable the latest features, avoid obsolete behavior, and reduce load times."
             }
         },
         "ConfigSchema": {