# Removing previous versions of .jar files

Discovery Framework 1.5 has replaced two dependency .jar files with newer versions. You must remove the previous versions.

For version 1.4 of the Discovery Framework, the lib/ext directory included the following .jar files:

- jackson-core-lgpl-1.6.2.jar
- jackson-mapper-lgpl-1.6.2.jar

In 1.5, these files are being replaced by:

- jackson-core-lgpl-1.7.2.jar
- jackson-mapper-lgpl-1.7.2.jar

Before installing Discovery Framework 1.5, you must remove the 1.6.2 .jar files.