diff --git a/builder/pom.xml b/builder/pom.xml
index d529718..9342c8a 100644
--- a/builder/pom.xml
+++ b/builder/pom.xml
@@ -32,7 +32,7 @@
         <mockito.version>2.21.0</mockito.version>
         <assertj.version>3.11.0</assertj.version>
         <conditional.version>0.6.0</conditional.version>
-        <fast-classpath-scanner.version>3.1.15</fast-classpath-scanner.version>
+        <classgraph.version>4.1.2</classgraph.version>
 
         <maven-checkstyle-plugin.version>3.0.0</maven-checkstyle-plugin.version>
         <kemitix.checkstyle.ruleset.version>${project.version}</kemitix.checkstyle.ruleset.version>
@@ -66,9 +66,9 @@
             <version>${conditional.version}</version>
         </dependency>
         <dependency>
-            <groupId>io.github.lukehutch</groupId>
-            <artifactId>fast-classpath-scanner</artifactId>
-            <version>${fast-classpath-scanner.version}</version>
+            <groupId>io.github.classgraph</groupId>
+            <artifactId>classgraph</artifactId>
+            <version>${classgraph.version}</version>
         </dependency>
         <dependency>
             <groupId>org.mockito</groupId>
diff --git a/builder/src/main/java/net/kemitix/checkstyle/ruleset/builder/DefaultPackageScanner.java b/builder/src/main/java/net/kemitix/checkstyle/ruleset/builder/DefaultPackageScanner.java
index f193f1b..232b08e 100644
--- a/builder/src/main/java/net/kemitix/checkstyle/ruleset/builder/DefaultPackageScanner.java
+++ b/builder/src/main/java/net/kemitix/checkstyle/ruleset/builder/DefaultPackageScanner.java
@@ -21,7 +21,7 @@
 
 package net.kemitix.checkstyle.ruleset.builder;
 
-import io.github.lukehutch.fastclasspathscanner.FastClasspathScanner;
+import io.github.classgraph.ClassGraph;
 import org.springframework.stereotype.Service;
 
 import java.util.List;
@@ -38,9 +38,11 @@ public class DefaultPackageScanner implements PackageScanner {
     @Override
     public final List<String> apply(final RuleSource ruleSource) {
         final String basePackage = ruleSource.getBasePackage();
-        return new FastClasspathScanner(basePackage)
+        return new ClassGraph()
+                .whitelistPackages(basePackage)
                 .scan()
-                .getNamesOfAllStandardClasses()
+                .getAllStandardClasses()
+                .getNames()
                 .stream()
                 .filter(packageName -> packageName.startsWith(basePackage))
                 .collect(Collectors.toList());