diff --git a/pom.xml b/pom.xml
index e5e1546..c5102ec 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,6 +23,19 @@
 			<version>5.6.0</version>
 		</dependency>
 
+		<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-simple -->
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-simple</artifactId>
+			<version>1.7.25</version>
+		</dependency>
+		
+		<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-api</artifactId>
+			<version>1.7.25</version>
+		</dependency>
 
 		<dependency>
 			<groupId>junit</groupId>