jdbc error

Unexpected error running Liquibase: java.lang.RuntimeException: Cannot find database driver: oracle.jdbc.driver.OracleDriver

liquibase.exception.DatabaseException: liquibase.exception.DatabaseException: java.lang.RuntimeException: Cannot find database driver: oracle.jdbc.driver.OracleDriver

        at liquibase.integration.commandline.CommandLineUtils.createDatabaseObject(CommandLineUtils.java:132)

        at liquibase.integration.commandline.Main.doMigration(Main.java:974)

        at liquibase.integration.commandline.Main.run(Main.java:199)

        at liquibase.integration.commandline.Main.main(Main.java:137)

Caused by: liquibase.exception.DatabaseException: java.lang.RuntimeException: Cannot find database driver: oracle.jdbc.driver.OracleDriver

        at liquibase.database.DatabaseFactory.openConnection(DatabaseFactory.java:254)

        at liquibase.database.DatabaseFactory.openDatabase(DatabaseFactory.java:149)

        at liquibase.integration.commandline.Co
Std err:

i have tried both oracle.jdbc.driver.OracleDriver & oracle.jdbc.OracleDriver  still getting the same error