diff --git a/source/gfoidl.Base64/Internal/Base64UrlEncoder/Base64UrlEncoder.Encode.cs b/source/gfoidl.Base64/Internal/Base64UrlEncoder/Base64UrlEncoder.Encode.cs
index 67fd342..674afed 100644
--- a/source/gfoidl.Base64/Internal/Base64UrlEncoder/Base64UrlEncoder.Encode.cs
+++ b/source/gfoidl.Base64/Internal/Base64UrlEncoder/Base64UrlEncoder.Encode.cs
@@ -246,7 +246,7 @@ private static uint FastMod3(uint value)
 
                 ulong lowbits = (ulong.MaxValue / 3 + 1) * value;
 
-                // 64bit * 64bit => 128bit isn't currently supported by Math https://github.com/dotnet/corefx/issues/41822
+                // 64bit * 64bit => 128bit isn't currently supported by Math https://github.com/dotnet/runtime/issues/31184
                 // otherwise we'd want this to be (uint)Math.BigMul(lowbits, divisor, out _)
                 uint highbits = (uint)((((lowbits >> 32) + 1) * 3) >> 32);