diff --git a/spring-boot-modules/spring-boot-libraries/pom.xml b/spring-boot-modules/spring-boot-libraries/pom.xml
index 36b9ec17c9..da4e979c17 100644
--- a/spring-boot-modules/spring-boot-libraries/pom.xml
+++ b/spring-boot-modules/spring-boot-libraries/pom.xml
@@ -88,34 +88,34 @@
             <version>${zxing.version}</version>
         </dependency>
 		<!-- Bucket4j -->
-		<dependency>
-			<groupId>com.github.vladimir-bukhtoyarov</groupId>
-			<artifactId>bucket4j-core</artifactId>
-			<version>${bucket4j.version}</version>
-		</dependency>
-		<dependency>
-			<groupId>com.giffing.bucket4j.spring.boot.starter</groupId>
-			<artifactId>bucket4j-spring-boot-starter</artifactId>
-			<version>${bucket4j-spring-boot-starter.version}</version>
-		</dependency>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-cache</artifactId>
-		</dependency>
-		<dependency>
-			<groupId>javax.cache</groupId>
-			<artifactId>cache-api</artifactId>
-		</dependency>
-		<dependency>
-			<groupId>com.github.ben-manes.caffeine</groupId>
-			<artifactId>caffeine</artifactId>
-			<version>${caffeine.version}</version>
-		</dependency>
-		<dependency>
-			<groupId>com.github.ben-manes.caffeine</groupId>
-			<artifactId>jcache</artifactId>
-			<version>${caffeine.version}</version>
-		</dependency>
+        <dependency>
+            <groupId>com.github.vladimir-bukhtoyarov</groupId>
+            <artifactId>bucket4j-core</artifactId>
+            <version>${bucket4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.giffing.bucket4j.spring.boot.starter</groupId>
+            <artifactId>bucket4j-spring-boot-starter</artifactId>
+            <version>${bucket4j-spring-boot-starter.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-cache</artifactId>
+            </dependency>
+        <dependency>
+            <groupId>javax.cache</groupId>
+            <artifactId>cache-api</artifactId>
+            </dependency>
+        <dependency>
+            <groupId>com.github.ben-manes.caffeine</groupId>
+            <artifactId>caffeine</artifactId>
+            <version>${caffeine.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.github.ben-manes.caffeine</groupId>
+            <artifactId>jcache</artifactId>
+            <version>${caffeine.version}</version>
+        </dependency>
     </dependencies>
 
     <repositories>
@@ -125,112 +125,112 @@
         </repository>
     </repositories>
 
-	<build>
-		<finalName>spring-boot-libraries</finalName>
-		<resources>
-			<resource>
-				<directory>src/main/resources</directory>
-				<filtering>true</filtering>
-			</resource>
-		</resources>
+    <build>
+        <finalName>spring-boot-libraries</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
 
-		<plugins>
+        <plugins>
 
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-war-plugin</artifactId>
-			</plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-war-plugin</artifactId>
+            </plugin>
 
-			<plugin>
-				<groupId>pl.project13.maven</groupId>
-				<artifactId>git-commit-id-plugin</artifactId>
-				<version>${git-commit-id-plugin.version}</version>
-				<executions>
-					<execution>
-						<id>get-the-git-infos</id>
-						<goals>
-							<goal>revision</goal>
-						</goals>
-						<phase>initialize</phase>
-					</execution>
-					<execution>
-						<id>validate-the-git-infos</id>
-						<goals>
-							<goal>validateRevision</goal>
-						</goals>
-						<phase>package</phase>
-					</execution>
-				</executions>
-				<configuration>
-					<generateGitPropertiesFile>true</generateGitPropertiesFile>
-					<generateGitPropertiesFilename>${project.build.outputDirectory}/git.properties</generateGitPropertiesFilename>
-				</configuration>
-			</plugin>
+            <plugin>
+                <groupId>pl.project13.maven</groupId>
+                <artifactId>git-commit-id-plugin</artifactId>
+                <version>${git-commit-id-plugin.version}</version>
+                <executions>
+                    <execution>
+                        <id>get-the-git-infos</id>
+                        <goals>
+                            <goal>revision</goal>
+                        </goals>
+                        <phase>initialize</phase>
+                    </execution>
+                    <execution>
+                        <id>validate-the-git-infos</id>
+                        <goals>
+                            <goal>validateRevision</goal>
+                        </goals>
+                        <phase>package</phase>
+                    </execution>
+                </executions>
+                <configuration>
+                    <generateGitPropertiesFile>true</generateGitPropertiesFile>
+                    <generateGitPropertiesFilename>${project.build.outputDirectory}/git.properties</generateGitPropertiesFilename>
+                </configuration>
+            </plugin>
 
         </plugins>
 
     </build>
 
-	<profiles>
-		<profile>
-			<id>autoconfiguration</id>
-			<build>
-				<plugins>
-					<plugin>
-						<groupId>org.apache.maven.plugins</groupId>
-						<artifactId>maven-surefire-plugin</artifactId>
-						<executions>
-							<execution>
-								<phase>integration-test</phase>
-								<goals>
-									<goal>test</goal>
-								</goals>
-								<configuration>
-									<excludes>
-										<exclude>**/*LiveTest.java</exclude>
-										<exclude>**/*IntegrationTest.java</exclude>
-										<exclude>**/*IntTest.java</exclude>
-									</excludes>
-									<includes>
-										<include>**/AutoconfigurationTest.java</include>
-									</includes>
-								</configuration>
-							</execution>
-						</executions>
-						<configuration>
-							<systemPropertyVariables>
-								<test.mime>json</test.mime>
-							</systemPropertyVariables>
-						</configuration>
-					</plugin>
-				</plugins>
-			</build>
-		</profile>
-	</profiles>
+    <profiles>
+        <profile>
+            <id>autoconfiguration</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <phase>integration-test</phase>
+                                <goals>
+                                    <goal>test</goal>
+                                </goals>
+                                <configuration>
+                                    <excludes>
+                                        <exclude>**/*LiveTest.java</exclude>
+                                        <exclude>**/*IntegrationTest.java</exclude>
+                                        <exclude>**/*IntTest.java</exclude>
+                                    </excludes>
+                                    <includes>
+                                        <include>**/AutoconfigurationTest.java</include>
+                                    </includes>
+                                </configuration>
+                            </execution>
+                        </executions>
+                        <configuration>
+                            <systemPropertyVariables>
+                                <test.mime>json</test.mime>
+                            </systemPropertyVariables>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
 
-	<properties>
-		<!-- The main class to start by executing java -jar -->
+    <properties>
+        <!-- The main class to start by executing java -jar -->
         <start-class>com.baeldung.intro.App</start-class>
         <tomee-servlet-api.version>8.5.11</tomee-servlet-api.version>
         <togglz.version>2.4.1.Final</togglz.version>
         <rome.version>1.9.0</rome.version>
         <chaos.monkey.version>2.0.0</chaos.monkey.version>
-		<graphql-spring-boot-starter.version>5.0.2</graphql-spring-boot-starter.version>
-		<graphiql-spring-boot-starter.version>5.0.2</graphiql-spring-boot-starter.version>
-		<graphql-java-tools.version>5.2.4</graphql-java-tools.version>
-		<guava.version>18.0</guava.version>
-		<git-commit-id-plugin.version>2.2.4</git-commit-id-plugin.version>
-		<modelmapper.version>2.3.2</modelmapper.version>
-		<problem-spring-web.version>0.23.0</problem-spring-web.version>
-		<h2.version>1.4.200</h2.version>
-		<shedlock.version>2.1.0</shedlock.version>
-		<barbecue.version>1.5-beta1</barbecue.version>
-		<barcode4j.version>2.1</barcode4j.version>
-		<qrgen.version>2.6.0</qrgen.version>
-		<zxing.version>3.3.0</zxing.version>
-		<bucket4j.version>4.10.0</bucket4j.version>
-		<bucket4j-spring-boot-starter.version>0.2.0</bucket4j-spring-boot-starter.version>
-		<caffeine.version>2.8.2</caffeine.version>
-	</properties>
+        <graphql-spring-boot-starter.version>5.0.2</graphql-spring-boot-starter.version>
+        <graphiql-spring-boot-starter.version>5.0.2</graphiql-spring-boot-starter.version>
+        <graphql-java-tools.version>5.2.4</graphql-java-tools.version>
+        <guava.version>18.0</guava.version>
+        <git-commit-id-plugin.version>2.2.4</git-commit-id-plugin.version>
+        <modelmapper.version>2.3.2</modelmapper.version>
+        <problem-spring-web.version>0.23.0</problem-spring-web.version>
+        <h2.version>1.4.200</h2.version>
+        <shedlock.version>2.1.0</shedlock.version>
+        <barbecue.version>1.5-beta1</barbecue.version>
+        <barcode4j.version>2.1</barcode4j.version>
+        <qrgen.version>2.6.0</qrgen.version>
+        <zxing.version>3.3.0</zxing.version>
+        <bucket4j.version>4.10.0</bucket4j.version>
+        <bucket4j-spring-boot-starter.version>0.2.0</bucket4j-spring-boot-starter.version>
+        <caffeine.version>2.8.2</caffeine.version>
+    </properties>
 
-</project>
+</project>
\ No newline at end of file
diff --git a/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/ratelimiting/bucket4japp/service/PricingPlan.java b/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/ratelimiting/bucket4japp/service/PricingPlan.java
index 2f225a83aa..27c30ba3a0 100644
--- a/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/ratelimiting/bucket4japp/service/PricingPlan.java
+++ b/spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/ratelimiting/bucket4japp/service/PricingPlan.java
@@ -11,7 +11,7 @@ public enum PricingPlan {
 
     BASIC(40),
 
-    PROFESSIONAL(100);;
+    PROFESSIONAL(100);
 
     private int bucketCapacity;