diff --git a/src/checkstyle/checkstyle.xml b/src/checkstyle/checkstyle.xml
index 63433b6f..c94b436f 100644
--- a/src/checkstyle/checkstyle.xml
+++ b/src/checkstyle/checkstyle.xml
@@ -1,6 +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">
+<!DOCTYPE module PUBLIC
+		"-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+		"https://checkstyle.org/dtds/configuration_1_3.dtd">
 <module name="com.puppycrawl.tools.checkstyle.Checker">
 	<module name="io.spring.javaformat.checkstyle.SpringChecks"/>
 	<module name="com.puppycrawl.tools.checkstyle.TreeWalker">
diff --git a/src/checkstyle/import-control.xml b/src/checkstyle/import-control.xml
index b153f28a..42523ac5 100644
--- a/src/checkstyle/import-control.xml
+++ b/src/checkstyle/import-control.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0"?>
-<!DOCTYPE import-control PUBLIC "-//Checkstyle//DTD ImportControl Configuration 1.4//EN"
+<!DOCTYPE import-control PUBLIC
+		"-//Checkstyle//DTD ImportControl Configuration 1.4//EN"
 		"https://checkstyle.org/dtds/import_control_1_4.dtd">
 <import-control pkg="io.spring.initializr">
 	<allow pkg=".*" regex="true"/>