diff --git a/.idea/copyright/profiles_settings.xml b/.idea/copyright/profiles_settings.xml
deleted file mode 100644
index e7bedf3..0000000
--- a/.idea/copyright/profiles_settings.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<component name="CopyrightManager">
-  <settings default="" />
-</component>
\ No newline at end of file
diff --git a/.idea/encodings.xml b/.idea/encodings.xml
deleted file mode 100644
index b26911b..0000000
--- a/.idea/encodings.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="Encoding">
-    <file url="file://$PROJECT_DIR$" charset="UTF-8" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
deleted file mode 100644
index ac56e84..0000000
--- a/.idea/modules.xml
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/kemitix-parent.iml" filepath="$PROJECT_DIR$/kemitix-parent.iml" />
-    </modules>
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
deleted file mode 100644
index 35eb1dd..0000000
--- a/.idea/vcs.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="" vcs="Git" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/kemitix-parent.iml b/kemitix-parent.iml
deleted file mode 100644
index 9e16274..0000000
--- a/kemitix-parent.iml
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
-    <output url="file://$MODULE_DIR$/target/classes" />
-    <output-test url="file://$MODULE_DIR$/target/test-classes" />
-    <content url="file://$MODULE_DIR$">
-      <excludeFolder url="file://$MODULE_DIR$/target" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 73e5dc6..567f148 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>net.kemitix</groupId>
@@ -40,15 +41,13 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <kemitix.build.directory>target</kemitix.build.directory>
-        <kemitix-checkstyle-ruleset.version>1.0.0</kemitix-checkstyle-ruleset.version>
+        <kemitix-checkstyle-ruleset.version>2.0.4</kemitix-checkstyle-ruleset.version>
+        <kemitix-checkstyle-ruleset.level>5-complexity</kemitix-checkstyle-ruleset.level>
 
         <maven-javadoc-plugin.version>2.10.4</maven-javadoc-plugin.version>
         <maven-source-plugin.version>3.0.1</maven-source-plugin.version>
         <maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
         <maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version>
-        <maven-checkstyle-plugin.version>2.17</maven-checkstyle-plugin.version>
-        <checkstyle.version>7.3</checkstyle.version>
-        <sevntu-checkstyle-maven-plugin.version>1.23.0</sevntu-checkstyle-maven-plugin.version>
         <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
         <maven-failsafe-plugin.version>2.19.1</maven-failsafe-plugin.version>
@@ -148,41 +147,24 @@
 
     <build>
         <directory>${kemitix.build.directory}</directory>
-        <pluginManagement>
-            <plugins>
-                <plugin>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-checkstyle-plugin</artifactId>
-                    <dependencies>
-                        <dependency>
-                            <groupId>com.puppycrawl.tools</groupId>
-                            <artifactId>checkstyle</artifactId>
-                            <version>${checkstyle.version}</version>
-                        </dependency>
-                        <dependency>
-                            <groupId>com.github.sevntu.checkstyle</groupId>
-                            <artifactId>sevntu-checkstyle-maven-plugin</artifactId>
-                            <version>${sevntu-checkstyle-maven-plugin.version}</version>
-                        </dependency>
-                        <dependency>
-                            <groupId>net.kemitix</groupId>
-                            <artifactId>kemitix-checkstyle-ruleset</artifactId>
-                            <version>${kemitix-checkstyle-ruleset.version}</version>
-                        </dependency>
-                    </dependencies>
-                    <configuration>
-                        <configLocation>net/kemitix/checkstyle.xml</configLocation>
-                        <encoding>UTF-8</encoding>
-                        <consoleOutput>true</consoleOutput>
-                        <failOnViolation>true</failOnViolation>
-                        <failsOnError>true</failsOnError>
-                        <linkXRef>true</linkXRef>
-                    </configuration>
-                </plugin><!-- maven-checkstyle-plugin -->
-            </plugins>
-        </pluginManagement>
 
         <plugins>
+            <plugin>
+                <groupId>net.kemitix</groupId>
+                <artifactId>kemitix-checkstyle-ruleset-maven-plugin</artifactId>
+                <version>${kemitix-checkstyle-ruleset.version}</version>
+                <configuration>
+                    <checkstyleVersion>7.4</checkstyleVersion>
+                </configuration>
+                <executions>
+                    <execution>
+                        <phase>validate</phase>
+                        <goals>
+                            <goal>${kemitix-checkstyle-ruleset.level}</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin><!-- kemitix-checkstyle-ruleset-maven-plugin -->
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
@@ -224,22 +206,6 @@
                 </executions>
             </plugin><!-- maven-failsafe-plugin -->
 
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-checkstyle-plugin</artifactId>
-                <version>${maven-checkstyle-plugin.version}</version>
-                <executions>
-                    <execution>
-                        <id>validate</id>
-                        <phase>validate</phase>
-                        <goals>
-                            <goal>check</goal>
-                            <goal>checkstyle</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin><!-- maven-checkstyle-plugin -->
-
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-pmd-plugin</artifactId>
@@ -383,18 +349,6 @@
                 <artifactId>jacoco-maven-plugin</artifactId>
                 <version>${jacoco-maven-plugin.version}</version>
             </plugin><!-- jacoco-maven-plugin -->
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-checkstyle-plugin</artifactId>
-                <version>${maven-checkstyle-plugin.version}</version>
-                <reportSets>
-                    <reportSet>
-                        <reports>
-                            <report>checkstyle</report>
-                        </reports>
-                    </reportSet>
-                </reportSets>
-            </plugin><!-- maven-checkstyle-plugin -->
 
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>