diff --git a/pom.xml b/pom.xml
index 68af893..0c60f8a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -18,38 +18,38 @@
     </modules>
 
     <build>
-      <plugins>
-        <plugin>
-          <groupId>org.codehaus.mojo</groupId>
-          <artifactId>flatten-maven-plugin</artifactId>
-          <version>1.1.0</version>
-          <configuration>
-            <updatePomFile>true</updatePomFile>
-            <flattenMode>resolveCiFriendliesOnly</flattenMode>
-          </configuration>
-          <executions>
-            <execution>
-              <id>flatten</id>
-              <phase>process-resources</phase>
-              <goals>
-                <goal>flatten</goal>
-              </goals>
-            </execution>
-            <execution>
-              <id>flatten.clean</id>
-              <phase>clean</phase>
-              <goals>
-                <goal>clean</goal>
-              </goals>
-            </execution>
-          </executions>
-        </plugin>
-        <plugin>
-          <groupId>org.apache.maven.plugins</groupId>
-          <artifactId>maven-surefire-plugin</artifactId>
-          <version>3.1.2</version>
-        </plugin>
-      </plugins>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>flatten-maven-plugin</artifactId>
+                <version>1.1.0</version>
+                <configuration>
+                    <updatePomFile>true</updatePomFile>
+                    <flattenMode>resolveCiFriendliesOnly</flattenMode>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>flatten</id>
+                        <phase>process-resources</phase>
+                        <goals>
+                            <goal>flatten</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>flatten.clean</id>
+                        <phase>clean</phase>
+                        <goals>
+                            <goal>clean</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>3.1.2</version>
+            </plugin>
+        </plugins>
     </build>
 
     <repositories>