diff --git a/Assets/VRM/UniJSON/Scripts/Extensions/DateTimeOffsetExtensions.cs b/Assets/VRM/UniJSON/Scripts/Extensions/DateTimeOffsetExtensions.cs
index 66c34633a..faed3e4b5 100644
--- a/Assets/VRM/UniJSON/Scripts/Extensions/DateTimeOffsetExtensions.cs
+++ b/Assets/VRM/UniJSON/Scripts/Extensions/DateTimeOffsetExtensions.cs
@@ -6,15 +6,17 @@ namespace UniJSON
     public static class DateTimeOffsetExtensions
     {
         public const long TicksPerSecond = 10000000;
-        public readonly static DateTimeOffset EpocTime = new DateTimeOffset(1970, 1, 1, 0, 0, 0, 0, TimeSpan.Zero);
+        public readonly static DateTimeOffset EpochTime = new DateTimeOffset(1970, 1, 1, 0, 0, 0, 0, TimeSpan.Zero);
+        [Obsolete("Use EpochTime")]
+        public readonly static DateTimeOffset EpocTime = EpochTime;
 #if !NET_4_6 && !NET_STANDARD_2_0
         public static long ToUnixTimeSeconds(this DateTimeOffset now)
         {
-            if (now < EpocTime)
+            if (now < EpochTime)
             {
                 throw new ArgumentOutOfRangeException();
             }
-            return (now - EpocTime).Ticks / TicksPerSecond;
+            return (now - EpochTime).Ticks / TicksPerSecond;
         }
 #endif
     }