Update commons-codec from 1.14 to 1.15.
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index 56da884..e265eeb 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -196,7 +196,7 @@
       Update maven-pmd-plugin from 3.12.0 to 3.13.0 #167.
     </action>
     <action type="update" dev="ggregory" due-to="Gary Gregory">
-      Update commons-codec from 1.14 to 1.15.
+      Update optional commons-codec from 1.14 to 1.15.
     </action>
   </release>
   <release version="4.4" date="2019-07-05" description="Maintenance release.">