diff --git a/config/checkstyle/checkstyle-import-control.xml b/config/checkstyle/checkstyle-import-control.xml
index af08f1a2..7bb744d3 100644
--- a/config/checkstyle/checkstyle-import-control.xml
+++ b/config/checkstyle/checkstyle-import-control.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE import-control PUBLIC "-//Puppy Crawl//DTD Import Control 1.1//EN" "http://www.puppycrawl.com/dtds/import_control_1_1.dtd">
+<!DOCTYPE import-control PUBLIC "-//Puppy Crawl//DTD Import Control 1.1//EN" "https://checkstyle.org/dtds/import_control_1_1.dtd">
 <import-control pkg="org.springframework.restdocs">
 
 	<allow pkg=".*" regex="true"/>
diff --git a/config/checkstyle/checkstyle-suppressions.xml b/config/checkstyle/checkstyle-suppressions.xml
index f74d9234..7c71fd49 100644
--- a/config/checkstyle/checkstyle-suppressions.xml
+++ b/config/checkstyle/checkstyle-suppressions.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!DOCTYPE suppressions PUBLIC
 	"-//Puppy Crawl//DTD Suppressions 1.1//EN"
-	"http://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
+	"https://checkstyle.org/dtds/suppressions_1_1.dtd">
 <suppressions>
 	<suppress files="[\\/]src[\\/]test[\\/]java[\\/]" checks="JavadocVariable" />
 	<suppress files="[\\/]src[\\/]test[\\/]java[\\/]" checks="JavadocMethod" />
diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
index d9cdead7..d2d3e80b 100644
--- a/config/checkstyle/checkstyle.xml
+++ b/config/checkstyle/checkstyle.xml
@@ -1,5 +1,5 @@
 <?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 "-//Puppy Crawl//DTD Check Configuration 1.2//EN" "https://checkstyle.org/dtds/configuration_1_2.dtd">
 <module name="Checker">
 
 	<!-- Root Checks -->