diff --git a/doc/osmCoverage.md b/doc/osmCoverage.md
index 0fb9f9c..bc15e7a 100644
--- a/doc/osmCoverage.md
+++ b/doc/osmCoverage.md
@@ -13,12 +13,13 @@
 * Used by NetBeans 8.2
 * OpenJDK 8
 
-### lib
+## External library
 
-* [hayashi.jar](https://osdn.net/projects/hayashilib/)  
-* [javax.json.jar](https://javaee.github.io/jsonp/)
-* [hsqldb_2.2.9.jar](http://hsqldb.org/)
-* [postgresql-42.2.4.jar](https://www.postgresql.org/)
+* [hayashi.jar](https://osdn.net/projects/hayashilib/releases/) - hayashi lib
+* [javax.json.jar](https://javaee.github.io/jsonp/) - JSON parser
+* [commons-compress-1.18.jar](https://commons.apache.org/proper/commons-compress/download_compress.cgi) - Apache Commons Compress
+* [hsqldb_2.2.9.jar](http://hsqldb.org/) - HSQLDB
+* [postgresql-42.2.4.jar](https://www.postgresql.org/) - PostgeSQL JDBC driver
 
 ### build