diff --git a/installer/pom.xml b/installer/pom.xml
index 8f80ba16..99b0beab 100644
--- a/installer/pom.xml
+++ b/installer/pom.xml
@@ -23,6 +23,7 @@
                 <configuration>
                     <source>1.7</source>
                     <target>1.7</target>
+                    <encoding>UTF-8</encoding>
                 </configuration>
             </plugin>
             <plugin>
@@ -61,7 +62,7 @@
                 </plugin>
                 <plugin>
                     <artifactId>maven-compiler-plugin</artifactId>
-                    <version>3.1</version>
+                    <version>3.5.1</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-dependency-plugin</artifactId>
diff --git a/pom.xml b/pom.xml
index 30f0479c..443fe030 100644
--- a/pom.xml
+++ b/pom.xml
@@ -232,6 +232,7 @@
                 <configuration>
                     <source>1.7</source>
                     <target>1.7</target>
+                    <encoding>UTF-8</encoding>
                 </configuration>
             </plugin>
         </plugins>
@@ -248,7 +249,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-compiler-plugin</artifactId>
-                    <version>3.3</version>
+                    <version>3.5.1</version>
                 </plugin>
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>