diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
index b000ccb311..850e3c8ec8 100644
--- a/config/checkstyle/checkstyle.xml
+++ b/config/checkstyle/checkstyle.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!DOCTYPE module PUBLIC
     "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
-    "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
+    "https://checkstyle.org/dtds/configuration_1_2.dtd">
 <module name="Checker">
     <!--
      Different editors and IDEs may insert or remove trailing