diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3df303d..9e89c01 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # CHANGELOG
 
+## Unreleased 
+
+* update cobertura DTD to a working URL.
+  [jarrodlombardo-EventBase](https://github.com/jarrodlombardo-EventBase)
+
 ## v2.8.2
 
 * coverage_info.include_files? needs a default true return value for when source_files is empty.
diff --git a/lib/slather/coverage_service/cobertura_xml_output.rb b/lib/slather/coverage_service/cobertura_xml_output.rb
index 7879a7f..ee75d7b 100644
--- a/lib/slather/coverage_service/cobertura_xml_output.rb
+++ b/lib/slather/coverage_service/cobertura_xml_output.rb
@@ -171,7 +171,7 @@ def create_empty_xml_report
           xml.doc.create_internal_subset(
             'coverage',
             nil,
-            "https://cobertura.sourceforge.net/xml/coverage-04.dtd"
+            "https://raw.githubusercontent.com/cobertura/cobertura/master/cobertura/src/site/htdocs/xml/coverage-04.dtd"
           )
           xml.coverage do
             xml.sources do