Since we are using Cosmovisor, it makes it very easy to prepare for upcomming upgrade. You just have to build new binaries and move it into cosmovisor upgrades directory.
Download and build upgrade binaries
# Clone project repository
cd $HOME
rm -rf persistence
git clone https://github.com/persistenceOne/persistenceCore persistence
cd persistence
git checkout v11.15.0
# Build binaries
make build && make install
# Prepare binaries for Cosmovisor
mkdir -p $DAEMON_HOME/cosmovisor/upgrades/v11.15.0/bin && cp $HOME/go/bin/persistenceCore $DAEMON_HOME/cosmovisor/upgrades/v11.15.0/bin
$DAEMON_HOME/cosmovisor/upgrades/v11.15.0/bin/persistenceCore version
rm -rf build
Thats it! Now when upgrade block height is reached, Cosmovisor will handle it automatically!