3 files changed, 8 insertions, 5 deletions
diff --git a/src/SMAPI/Framework/Utilities/ContextHash.cs b/src/SMAPI/Framework/Utilities/ContextHash.cs
index 6c0fdc90..46b9099e 100644
--- a/src/SMAPI/Framework/Utilities/ContextHash.cs
+++ b/src/SMAPI/Framework/Utilities/ContextHash.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Collections.Generic;
 
diff --git a/src/SMAPI/Framework/Utilities/Countdown.cs b/src/SMAPI/Framework/Utilities/Countdown.cs
index 342b4258..94c69e73 100644
--- a/src/SMAPI/Framework/Utilities/Countdown.cs
+++ b/src/SMAPI/Framework/Utilities/Countdown.cs
@@ -1,4 +1,4 @@
-namespace StardewModdingAPI.Framework.Utilities
+namespace StardewModdingAPI.Framework.Utilities
 {
     /// <summary>Counts down from a baseline value.</summary>
     internal class Countdown
diff --git a/src/SMAPI/Framework/Utilities/TickCacheDictionary.cs b/src/SMAPI/Framework/Utilities/TickCacheDictionary.cs
index 1613a480..94ce0069 100644
--- a/src/SMAPI/Framework/Utilities/TickCacheDictionary.cs
+++ b/src/SMAPI/Framework/Utilities/TickCacheDictionary.cs
@@ -1,6 +1,7 @@
+#nullable disable
+
 using System;
 using System.Collections.Generic;
-using StardewValley;
 
 namespace StardewModdingAPI.Framework.Utilities
 {
@@ -13,7 +14,7 @@ namespace StardewModdingAPI.Framework.Utilities
         ** Fields
         *********/
         /// <summary>The last game tick for which data was cached.</summary>
-        private int LastGameTick = -1;
+        private uint? LastGameTick;
 
         /// <summary>The underlying cached data.</summary>
         private readonly Dictionary<TKey, TValue> Cache = new();
@@ -28,10 +29,10 @@ namespace StardewModdingAPI.Framework.Utilities
         public TValue GetOrSet(TKey cacheKey, Func<TValue> get)
         {
             // clear cache on new tick
-            if (Game1.ticks != this.LastGameTick)
+            if (SCore.ProcessTicksElapsed != this.LastGameTick)
             {
                 this.Cache.Clear();
-                this.LastGameTick = Game1.ticks;
+                this.LastGameTick = SCore.ProcessTicksElapsed;
             }
 
             // fetch value