diff --git a/Directory.Build.props b/Directory.Build.props
index 4630bd8..8434e7f 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -11,11 +11,11 @@
         <RepositoryType>git</RepositoryType>
         <PackageTags>siemens;s7</PackageTags>
 
-        <PackageVersion>1.1.2</PackageVersion>
-        <AssemblyVersion>1.1.2</AssemblyVersion>
-        <FileVersion>1.1.2</FileVersion>
-        <Version>1.1.2</Version>
-        <PackageReleaseNotes>Internal naming changes</PackageReleaseNotes>
+        <PackageVersion>1.1.3</PackageVersion>
+        <AssemblyVersion>1.1.3</AssemblyVersion>
+        <FileVersion>1.1.3</FileVersion>
+        <Version>1.1.3</Version>
+        <PackageReleaseNotes>Fix legacy challenge fingerprint derivation for the final lookup-table block.</PackageReleaseNotes>
 
         <PackageIcon>nuget-icon.png</PackageIcon>
     </PropertyGroup>
diff --git a/HarpoS7.Tests/Fingerprint/HarpoFingerprintTests.cs b/HarpoS7.Tests/Fingerprint/HarpoFingerprintTests.cs
index 4b746f9..7ee92fa 100644
--- a/HarpoS7.Tests/Fingerprint/HarpoFingerprintTests.cs
+++ b/HarpoS7.Tests/Fingerprint/HarpoFingerprintTests.cs
@@ -5,6 +5,32 @@ namespace HarpoS7.Tests.Fingerprint;
 
 public class HarpoFingerprintTests
 {
+    [Test]
+    public void LookupTablesCoverEveryComputedBlock()
+    {
+        for (var index = 0; index < FingerprintConsts.Data1Collection.Length; index++)
+        {
+            var operations = FingerprintConsts.Data1Collection[index].Length / 3;
+            var requiredBytes = operations * 128;
+            var availableBytes = FingerprintConsts.Data2Collection[index].Length * sizeof(ushort);
+            Assert.That(
+                availableBytes,
+                Is.GreaterThanOrEqualTo(requiredBytes),
+                $"Fingerprint table {index} is too short for its computed indices");
+        }
+    }
+
+    [Test]
+    public void FingerprintChallengeHandlesCapturedLegacyRenewalEdgeCase()
+    {
+        Span<byte> fingerprint = stackalloc byte[FingerprintConsts.FingerprintLength];
+        var challenge = Convert.FromHexString("5B15B4694FC38A775E6778F0770C6E7A3118200D");
+
+        HarpoFingerprint.FingerprintChallenge(fingerprint, challenge);
+
+        Assert.That(Convert.ToHexString(fingerprint), Is.EqualTo("6AB5811DE6D28746"));
+    }
+
     public static IEnumerable<TestCaseData> FingerprintSubProcedureCases
         {
             get
@@ -1003,4 +1029,4 @@ public void FingerprintChallenge()
         var expectedFingerprint = new byte[8] { 0xe2, 0x87, 0xc1, 0xcb, 0x65, 0x9b, 0x9e, 0xdf }.AsSpan();
         Assert.That(expectedFingerprint.SequenceEqual(fingerprint));
     }
-}
\ No newline at end of file
+}
diff --git a/HarpoS7/Fingerprint/FingerprintConsts.cs b/HarpoS7/Fingerprint/FingerprintConsts.cs
index 719c31c..55850f8 100644
--- a/HarpoS7/Fingerprint/FingerprintConsts.cs
+++ b/HarpoS7/Fingerprint/FingerprintConsts.cs
@@ -524,7 +524,7 @@ public static class FingerprintConsts
             0xd7b1, 0xe73f, 0x7a90, 0xb821, 0xc54b, 0xabd6, 0x7552, 0x4a40, 0xf0d3, 0x2dbf, 0x1fc5, 0xcc99, 0x8111,
             0x4305, 0x7080, 0xe835, 0xbf4, 0x43f, 0x6a5f, 0x2ab3, 0xf854, 0x1f7f, 0x3491, 0xd376, 0xd0bb, 0x7bc7,
             0xed86, 0x7fbc, 0x2e5b, 0xc137, 0x8bcb, 0xe9ad, 0xb41c, 0xd4ce, 0x77d5, 0xc22f, 0x929f, 0xb6b2, 0xd74f,
-            0xe11d, 0xf565, 0x823f, 0x518b, 0xa857, 0xbf08
+            0xe11d, 0xf565, 0x823f, 0x518b, 0xa857, 0xbf08, 0x4c28
         },
         new ushort[]
         {
@@ -2710,4 +2710,4 @@ public static class FingerprintConsts
             0xbc27, 0xf54d, 0x261
         },
     };
-}
\ No newline at end of file
+}