diff --git a/builder/src/main/resources/checkstyle-template.xml b/builder/src/main/resources/checkstyle-template.xml
index 11f504b..104b975 100644
--- a/builder/src/main/resources/checkstyle-template.xml
+++ b/builder/src/main/resources/checkstyle-template.xml
@@ -6,10 +6,10 @@
 
     %s
 
-    <module name="Treewalker">
+    <module name="TreeWalker">
 
         %s
 
-    </module><!-- /Treewalker -->
+    </module><!-- /TreeWalker -->
 
 </module><!-- /Checker -->
diff --git a/ruleset/src/main/resources/net/kemitix/checkstyle-1-layout.xml b/ruleset/src/main/resources/net/kemitix/checkstyle-1-layout.xml
index f735337..72c0d46 100644
--- a/ruleset/src/main/resources/net/kemitix/checkstyle-1-layout.xml
+++ b/ruleset/src/main/resources/net/kemitix/checkstyle-1-layout.xml
@@ -13,7 +13,7 @@
     <property name="lineSeparator" value="lf"/>
 </module>
 
-    <module name="Treewalker">
+    <module name="TreeWalker">
 
         <module name="AnnotationLocation"/>
 <module name="AnnotationUseStyle"/>
@@ -56,6 +56,6 @@
 <module name="WhitespaceAround"/>
 <module name="ForbidCCommentsInMethods"/>
 
-    </module><!-- /Treewalker -->
+    </module><!-- /TreeWalker -->
 
 </module><!-- /Checker -->
diff --git a/ruleset/src/main/resources/net/kemitix/checkstyle-2-naming.xml b/ruleset/src/main/resources/net/kemitix/checkstyle-2-naming.xml
index 1922ac7..8c93a6b 100644
--- a/ruleset/src/main/resources/net/kemitix/checkstyle-2-naming.xml
+++ b/ruleset/src/main/resources/net/kemitix/checkstyle-2-naming.xml
@@ -13,7 +13,7 @@
     <property name="lineSeparator" value="lf"/>
 </module>
 
-    <module name="Treewalker">
+    <module name="TreeWalker">
 
         <module name="AbbreviationAsWordInName"/>
 <module name="AbstractClassName"/>
@@ -87,6 +87,6 @@
 <module name="SimpleAccessorNameNotation"/>
 <module name="UniformEnumConstantName"/>
 
-    </module><!-- /Treewalker -->
+    </module><!-- /TreeWalker -->
 
 </module><!-- /Checker -->
diff --git a/ruleset/src/main/resources/net/kemitix/checkstyle-3-javadoc.xml b/ruleset/src/main/resources/net/kemitix/checkstyle-3-javadoc.xml
index 1f6ff2f..50bda7e 100644
--- a/ruleset/src/main/resources/net/kemitix/checkstyle-3-javadoc.xml
+++ b/ruleset/src/main/resources/net/kemitix/checkstyle-3-javadoc.xml
@@ -16,7 +16,7 @@
 <module name="Translation"/>
 <module name="UniqueProperties"/>
 
-    <module name="Treewalker">
+    <module name="TreeWalker">
 
         <module name="AbbreviationAsWordInName"/>
 <module name="AbstractClassName"/>
@@ -113,6 +113,6 @@
 <module name="SimpleAccessorNameNotation"/>
 <module name="UniformEnumConstantName"/>
 
-    </module><!-- /Treewalker -->
+    </module><!-- /TreeWalker -->
 
 </module><!-- /Checker -->
diff --git a/ruleset/src/main/resources/net/kemitix/checkstyle-4-tweaks.xml b/ruleset/src/main/resources/net/kemitix/checkstyle-4-tweaks.xml
index ed4fb6b..efa1674 100644
--- a/ruleset/src/main/resources/net/kemitix/checkstyle-4-tweaks.xml
+++ b/ruleset/src/main/resources/net/kemitix/checkstyle-4-tweaks.xml
@@ -16,7 +16,7 @@
 <module name="Translation"/>
 <module name="UniqueProperties"/>
 
-    <module name="Treewalker">
+    <module name="TreeWalker">
 
         <module name="AbbreviationAsWordInName"/>
 <module name="AbstractClassName"/>
@@ -171,6 +171,6 @@
 <module name="UselessSingleCatch"/>
 <module name="UselessSuperCtorCall"/>
 
-    </module><!-- /Treewalker -->
+    </module><!-- /TreeWalker -->
 
 </module><!-- /Checker -->
diff --git a/ruleset/src/main/resources/net/kemitix/checkstyle-5-complexity.xml b/ruleset/src/main/resources/net/kemitix/checkstyle-5-complexity.xml
index 87f31a8..66acfe0 100644
--- a/ruleset/src/main/resources/net/kemitix/checkstyle-5-complexity.xml
+++ b/ruleset/src/main/resources/net/kemitix/checkstyle-5-complexity.xml
@@ -17,7 +17,7 @@
 <module name="Translation"/>
 <module name="UniqueProperties"/>
 
-    <module name="Treewalker">
+    <module name="TreeWalker">
 
         <module name="AbbreviationAsWordInName"/>
 <module name="AbstractClassName"/>
@@ -224,6 +224,6 @@
 <module name="UselessSingleCatch"/>
 <module name="UselessSuperCtorCall"/>
 
-    </module><!-- /Treewalker -->
+    </module><!-- /TreeWalker -->
 
 </module><!-- /Checker -->