diff --git a/benchmark/pom.xml b/benchmark/pom.xml
index f2e356c..f9f4816 100644
--- a/benchmark/pom.xml
+++ b/benchmark/pom.xml
@@ -29,6 +29,9 @@
             <url>https://github.com/dwrensha</url>
         </developer>
     </developers>
+    <properties>
+      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
     <dependencies>
         <dependency>
           <groupId>org.capnproto</groupId>
diff --git a/compiler/pom.xml b/compiler/pom.xml
index 592d261..d211043 100644
--- a/compiler/pom.xml
+++ b/compiler/pom.xml
@@ -29,6 +29,9 @@
             <url>https://github.com/dwrensha</url>
         </developer>
     </developers>
+    <properties>
+      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
     <dependencies>
         <dependency>
             <groupId>junit</groupId>
diff --git a/examples/pom.xml b/examples/pom.xml
index 9686114..bf3648e 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -29,6 +29,9 @@
             <url>https://github.com/dwrensha</url>
         </developer>
     </developers>
+    <properties>
+      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
     <dependencies>
         <dependency>
           <groupId>org.capnproto</groupId>
diff --git a/runtime/pom.xml b/runtime/pom.xml
index d816ee6..dd5f26d 100644
--- a/runtime/pom.xml
+++ b/runtime/pom.xml
@@ -29,6 +29,9 @@
             <url>https://github.com/dwrensha</url>
         </developer>
     </developers>
+    <properties>
+      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
     <dependencies>
         <dependency>
             <groupId>junit</groupId>