diff --git a/.classpath b/.classpath
index ae0ca56..d482073 100644
--- a/.classpath
+++ b/.classpath
@@ -26,5 +26,6 @@
 	<classpathentry kind="lib" path="lib/xidyn-1.11.2.jar" sourcepath="lib/xidyn-1.11.2-sources.zip"/>
 	<classpathentry kind="lib" path="lib/devinsy-strings-0.11.3.jar" sourcepath="lib/devinsy-strings-0.11.3-sources.zip"/>
 	<classpathentry kind="lib" path="lib/jOpenDocument-1.3.jar" sourcepath="lib/jOpenDocument-src-1.3.zip"/>
+	<classpathentry kind="lib" path="lib/threeten-extra-1.5.0.jar" sourcepath="lib/threeten-extra-1.5.0-sources.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/lib/threeten-extra-1.5.0-sources.jar b/lib/threeten-extra-1.5.0-sources.jar
new file mode 100644
index 0000000..8e00f88
Binary files /dev/null and b/lib/threeten-extra-1.5.0-sources.jar differ
diff --git a/lib/threeten-extra-1.5.0.jar b/lib/threeten-extra-1.5.0.jar
new file mode 100644
index 0000000..45f8c3d
Binary files /dev/null and b/lib/threeten-extra-1.5.0.jar differ