diff --git a/HISTORY.md b/HISTORY.md
index 3ffb70ed..923e417d 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,3 +1,8 @@
+## v30.0.1-beta-4
+Release Date: 2020-07-23
+
+* Change credit card `CheckDigitExtension` methods to public
+
 ## v30.0.1-beta-3
 Release Date: 2020-06-29
 
diff --git a/Source/Bogus.Tests/GitHubIssues/Issue313.cs b/Source/Bogus.Tests/GitHubIssues/Issue313.cs
new file mode 100644
index 00000000..a216bbbd
--- /dev/null
+++ b/Source/Bogus.Tests/GitHubIssues/Issue313.cs
@@ -0,0 +1,26 @@
+using Xunit;
+using Bogus.Extensions.Extras;
+using FluentAssertions;
+
+namespace Bogus.Tests.GitHubIssues
+{
+   public class Issue313 : SeededTest
+   {
+      [Fact]
+      public void can_create_custom_credit_card_number_PAN()
+      {
+         var f = new Faker();
+         Visa16Digit(f).Should()
+            .HaveLength(16)
+            .And
+            .Be("4618606064391758");
+      }
+
+      public static string Visa16Digit(Faker f)
+      {
+         const string format = "4##############";
+         return f.Random.ReplaceNumbers(format).AppendCheckDigit();
+      }
+   }
+
+}
\ No newline at end of file
diff --git a/Source/Bogus/Extensions/Extras/CheckDigitExtension.cs b/Source/Bogus/Extensions/Extras/CheckDigitExtension.cs
index 51fb0f6c..8231467d 100644
--- a/Source/Bogus/Extensions/Extras/CheckDigitExtension.cs
+++ b/Source/Bogus/Extensions/Extras/CheckDigitExtension.cs
@@ -7,7 +7,7 @@ namespace Bogus.Extensions.Extras
    /// Shamelessly copied (and modified) from here: 
    /// https://stackoverflow.com/questions/21249670/implementing-luhn-algorithm-using-c-sharp
    /// </summary>
-   internal static class CheckDigitExtension
+   public static class CheckDigitExtension
    {
       static readonly int[] Results = {0, 2, 4, 6, 8, 1, 3, 5, 7, 9};