diff --git a/project_conf/checks.xml b/project_conf/checks.xml
index 51ef1ad3a6..2b89f1dd4a 100644
--- a/project_conf/checks.xml
+++ b/project_conf/checks.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!DOCTYPE module PUBLIC
-  "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
-  "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+    "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+    "https://checkstyle.org/dtds/configuration_1_3.dtd">
 
 <!--
 
diff --git a/project_conf/suppression.xml b/project_conf/suppression.xml
index e188d69582..0a32f1c0f0 100644
--- a/project_conf/suppression.xml
+++ b/project_conf/suppression.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0"?>
 
 <!DOCTYPE suppressions PUBLIC
-    "-//Puppy Crawl//DTD Suppressions 1.2//EN"
-    "http://checkstyle.sourceforge.net/dtds/suppressions_1_2.dtd">
+    "-//Checkstyle//DTD SuppressionFilter Configuration 1.2//EN"
+    "https://checkstyle.org/dtds/suppressions_1_2.dtd">
 
 <suppressions>
     <suppress files="[\\/]src[\\/]test[\\/].*" id="JavadocTypeMain" />