diff --git a/opennlp-similarity/pom.xml b/opennlp-similarity/pom.xml
index 8978ef1..7decfa6 100644
--- a/opennlp-similarity/pom.xml
+++ b/opennlp-similarity/pom.xml
@@ -186,17 +186,17 @@
 				  </executions>
 			  </plugin>
 	      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-gpg-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>sign-artifacts</id>
-            <phase>verify</phase>
-            <goals>
-              <goal>sign</goal>
-            </goals>
-          </execution>
-        </executions>
+	        <groupId>org.apache.maven.plugins</groupId>
+	        <artifactId>maven-gpg-plugin</artifactId>
+	        <executions>
+	          <execution>
+	            <id>sign-artifacts</id>
+	            <phase>verify</phase>
+	            <goals>
+	              <goal>sign</goal>
+	            </goals>
+	          </execution>
+	        </executions>
       </plugin>
 		</plugins>
 	</build>