diff --git a/checkstyle.xml b/checkstyle.xml
index 304bdb4..3800d43 100644
--- a/checkstyle.xml
+++ b/checkstyle.xml
@@ -19,8 +19,8 @@
 -->
 
 <!DOCTYPE module PUBLIC
-    "-//Puppy Crawl//DTD Check Configuration 1.1//EN"
-    "http://www.puppycrawl.com/dtds/configuration_1_1.dtd">
+    "-//Checkstyle//DTD Checkstyle Configuration 1.2//EN"
+    "https://checkstyle.org/dtds/configuration_1_2.dtd">
 
 <!--
   Checkstyle checks configured for Maven.