diff --git a/src/Sarif/GitHelper.cs b/src/Sarif/GitHelper.cs
index 055ef3c75..496742434 100644
--- a/src/Sarif/GitHelper.cs
+++ b/src/Sarif/GitHelper.cs
@@ -43,7 +43,7 @@ public bool IsRepositoryRoot(string repoPath)
                 repoPath.Substring(0, repoPath.Length - 1) :
                 repoPath;
 
-            return repoPath.Equals(GetTopLevel(repoPath));
+            return repoPath.Equals(GetTopLevel(repoPath), StringComparison.OrdinalIgnoreCase);
         }
 
         public GitHelper(IFileSystem fileSystem = null, ProcessRunner processRunner = null)