diff --git a/Scripts/ProcessCoverage.swift b/Scripts/ProcessCoverage.swift
index 5ff359e..a3ff055 100755
--- a/Scripts/ProcessCoverage.swift
+++ b/Scripts/ProcessCoverage.swift
@@ -138,7 +138,9 @@ for d in report.data {
     out += "<pre id=\"f\(fileID)\" style=\"display: none\"><span>"
     var segments = f.segments
     for (index, line) in try
-      (String(contentsOfFile: f.filename).split(omittingEmptySubsequences: false) { $0.isNewline })
+      (String(contentsOfFile: f.filename, encoding: .utf8).split(omittingEmptySubsequences: false) {
+        $0.isNewline
+      })
       .enumerated()
     {
       var l = line