diff --git a/pom.xml b/pom.xml
index 64cf2e2e3..d2fcc5ee0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -13,8 +13,8 @@
 	<description />
 
 	<properties>
-		<maven.compiler.target>1.8</maven.compiler.target>
-		<maven.compiler.source>1.8</maven.compiler.source>
+		<maven.compiler.target>1.7</maven.compiler.target>
+		<maven.compiler.source>1.7</maven.compiler.source>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<!-- Dependencies versions. -->
 		<slf4j.version>1.7.10</slf4j.version>
@@ -126,6 +126,12 @@
 			<artifactId>commons-collections4</artifactId>
 			<version>4.0</version>
 		</dependency>
+		
+		<dependency>
+			<groupId>org.threeten</groupId>
+			<artifactId>threetenbp</artifactId>
+			<version>1.3.3</version>
+		</dependency>
 
 		<dependency>
 			<groupId>junit</groupId>