Hello,
check you license with "show lic" command:
show license
Index 1 Feature: advipservices
Period left: 0 minute 0 second
Index 2 Feature: ipservices
Period left: Life time
License Type: Permanent
License State: Active, In Use
License Priority: Medium
License Count: Non-Counted
Index 3 Feature: ipbase
Period left: 0 minute 0 second
If you have a valid ipservices license, you can upgrade your IOS version without problems.
License is installed once and IOS upgrade should not modify it.
Regards.