diff --git a/docs/release-notes.md b/docs/release-notes.md
index 297d8394..e335990b 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -19,6 +19,7 @@
   * Fixed rare issue where the console showed incorrect colors when mods wrote to it asynchronously.
   * Fixed SMAPI not always detecting broken field references in mod code.
   * Removed the experimental `RewriteInParallel` option added in SMAPI 3.6 (it was already disabled by default). Unfortunately this caused intermittent and unpredictable errors when enabled.
+  * Internal changes to prepare for upcoming game updates.
 
 * For modders:
   * You can now read/write `SDate` values to JSON (e.g. for `config.json`, network mod messages, etc).
diff --git a/src/SMAPI/Constants.cs b/src/SMAPI/Constants.cs
index b7977fb7..485e35fa 100644
--- a/src/SMAPI/Constants.cs
+++ b/src/SMAPI/Constants.cs
@@ -57,7 +57,7 @@ namespace StardewModdingAPI
         public static ISemanticVersion MinimumGameVersion { get; } = new GameVersion("1.4.1");
 
         /// <summary>The maximum supported version of Stardew Valley.</summary>
-        public static ISemanticVersion MaximumGameVersion { get; } = null;
+        public static ISemanticVersion MaximumGameVersion { get; } = new GameVersion("1.4.5");
 
         /// <summary>The target game platform.</summary>
         public static GamePlatform TargetPlatform { get; } = EarlyConstants.Platform;