IOracle public immutable chainlinkOracle;
- IOracle public immutable chainlinkOracle;
+ IOracle public chainlinkOracle;
..snip
+function updateChainlinkOracle(address newOracle) external onlyRole(MANAGER_ROLE) {
+    require(newOracle != address(0), "Invalid oracle address");
+    chainlinkOracle = IOracle(newOracle);
+}
