diff --git a/src/main/config/checkstyle/checkstyle.xml b/src/main/config/checkstyle/checkstyle.xml
index 7a6a04ae..c53a3715 100644
--- a/src/main/config/checkstyle/checkstyle.xml
+++ b/src/main/config/checkstyle/checkstyle.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!DOCTYPE module PUBLIC
-          "-//Checkstyle//DTD Configuration 1.3//EN"
-          "http://checkstyle.sourceforge.net/dtds/configuration_1_3.dtd">
+          "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+          "https://checkstyle.org/dtds/configuration_1_3.dtd">
 
   <!-- Checkstyle configuration based on the following:                    -->
   <!-- 1) Java Language Specification:                                     -->