diff --git a/v1/pom.xml b/v1/pom.xml
index 906d1bd..7e34e64 100644
--- a/v1/pom.xml
+++ b/v1/pom.xml
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
@@ -13,6 +14,10 @@
   <!-- USE "mvn clean generate-sources" to run this POM -->
   <!-- ################################################ -->
 
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
   <build>
     <sourceDirectory>src</sourceDirectory>
     <plugins>
diff --git a/v2/pom.xml b/v2/pom.xml
index eb8ef7b..93c4171 100644
--- a/v2/pom.xml
+++ b/v2/pom.xml
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
@@ -13,6 +14,10 @@
   <!-- USE "mvn clean generate-sources" to run this POM -->
   <!-- ################################################ -->
 
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
   <build>
     <sourceDirectory>src</sourceDirectory>
     <plugins>