diff --git a/pom.xml b/pom.xml
index 65ffd7f..d3d997e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -105,7 +105,7 @@
       <dependency>
         <groupId>com.io7m.jproperties</groupId>
         <artifactId>com.io7m.jproperties.core</artifactId>
-        <version>3.2.0</version>
+        <version>4.0.0</version>
       </dependency>
       <dependency>
         <groupId>com.io7m.jlexing</groupId>