diff --git a/.gas-snapshot b/.gas-snapshot
index ddd9f78e..c79f5f1c 100644
--- a/.gas-snapshot
+++ b/.gas-snapshot
@@ -449,91 +449,87 @@ StakedEXATest:invariantIndexUpOnly() (runs: 256, calls: 128000, reverts: 0)
 StakedEXATest:invariantNoDuplicatedReward() (runs: 256, calls: 128000, reverts: 0)
 StakedEXATest:invariantRewardsUpOnly() (runs: 256, calls: 128000, reverts: 0)
 StakedEXATest:invariantShareValueIsOne() (runs: 256, calls: 128000, reverts: 0)
-StakedEXATest:testAlreadyListedError() (gas: 41740)
-StakedEXATest:testAvgIndex(uint256[3],uint256[2]) (runs: 256, μ: 1211447, ~: 1247428)
-StakedEXATest:testAvgStartTime(uint256[3],uint256[2]) (runs: 256, μ: 1197754, ~: 1233735)
-StakedEXATest:testBalanceOfDeposit(uint80) (runs: 256, μ: 355829, ~: 362889)
-StakedEXATest:testBalanceOfWithdraw(uint256) (runs: 256, μ: 60613, ~: 60620)
-StakedEXATest:testCanChangeRewardsDurationWhenDisabled() (gas: 168281)
-StakedEXATest:testClaimAfterHarvest() (gas: 838729)
-StakedEXATest:testClaimAndUnstake() (gas: 1478790)
+StakedEXATest:testAlreadyListedError() (gas: 41631)
+StakedEXATest:testAvgIndex(uint256[3],uint256[2]) (runs: 256, μ: 1207225, ~: 1246894)
+StakedEXATest:testAvgStartTime(uint256[3],uint256[2]) (runs: 256, μ: 1193598, ~: 1233267)
+StakedEXATest:testBalanceOfDeposit(uint80) (runs: 256, μ: 355743, ~: 362801)
+StakedEXATest:testBalanceOfWithdraw(uint256) (runs: 256, μ: 60525, ~: 60532)
+StakedEXATest:testCanChangeRewardsDurationWhenDisabled() (gas: 168192)
+StakedEXATest:testClaimAfterHarvest() (gas: 838641)
+StakedEXATest:testClaimAndUnstake() (gas: 1478569)
 StakedEXATest:testClaimAndWithdrawAfterRefTime() (gas: 1086141)
-StakedEXATest:testClaimBeforeFirstHarvest() (gas: 540618)
-StakedEXATest:testDepositEvent(uint256) (runs: 256, μ: 364687, ~: 364381)
-StakedEXATest:testDepositShouldClaim(uint256[2],uint32) (runs: 256, μ: 818907, ~: 742847)
-StakedEXATest:testDepositWithdrawAvgStartTimeAndIndex(uint256[3],uint256,uint256[5]) (runs: 256, μ: 1740706, ~: 1799529)
-StakedEXATest:testEarnedWithTime(uint256) (runs: 256, μ: 35592, ~: 35875)
-StakedEXATest:testEmergencyAdminCanPauseNotUnpause() (gas: 159060)
-StakedEXATest:testExcessFactorRange() (gas: 37135)
-StakedEXATest:testFinishDistributionEmitEvent() (gas: 402046)
-StakedEXATest:testFinishDistributionLetsClaimUnclaimed() (gas: 1506264)
-StakedEXATest:testFinishDistributionStopsEmission() (gas: 1485917)
-StakedEXATest:testFinishDistributionThatAlreadyFinished() (gas: 436388)
+StakedEXATest:testClaimBeforeFirstHarvest() (gas: 540574)
+StakedEXATest:testDepositEvent(uint256) (runs: 256, μ: 364784, ~: 364493)
+StakedEXATest:testDepositShouldClaim(uint256[2],uint32) (runs: 256, μ: 822860, ~: 742798)
+StakedEXATest:testDepositWithdrawAvgStartTimeAndIndex(uint256[3],uint256,uint256[5]) (runs: 256, μ: 1742615, ~: 1799630)
+StakedEXATest:testEarnedWithTime(uint256) (runs: 256, μ: 35521, ~: 35809)
+StakedEXATest:testEmergencyAdminCanPauseNotUnpause() (gas: 159061)
+StakedEXATest:testFinishDistributionEmitEvent() (gas: 402002)
+StakedEXATest:testFinishDistributionLetsClaimUnclaimed() (gas: 1506044)
+StakedEXATest:testFinishDistributionStopsEmission() (gas: 1485719)
+StakedEXATest:testFinishDistributionThatAlreadyFinished() (gas: 436322)
 StakedEXATest:testFinishDistributionTransfersRemainingToSavings() (gas: 111466)
-StakedEXATest:testGrantRevokeEmergencyAdmin() (gas: 107326)
-StakedEXATest:testGrantRevokePauser() (gas: 107213)
-StakedEXATest:testHandlerClaim(uint8) (runs: 256, μ: 302433, ~: 302433)
-StakedEXATest:testHandlerDeposit(uint80) (runs: 256, μ: 800016, ~: 811131)
-StakedEXATest:testHandlerHarvest(uint64) (runs: 256, μ: 333455, ~: 332862)
-StakedEXATest:testHandlerNotifyRewardAmount(uint64) (runs: 256, μ: 128760, ~: 124447)
-StakedEXATest:testHandlerSetDuration(uint32) (runs: 256, μ: 147216, ~: 163950)
-StakedEXATest:testHandlerWithdraw(uint256) (runs: 256, μ: 70039, ~: 70046)
+StakedEXATest:testGrantRevokeEmergencyAdmin() (gas: 107216)
+StakedEXATest:testGrantRevokePauser() (gas: 107235)
+StakedEXATest:testHandlerClaim(uint8) (runs: 256, μ: 302701, ~: 302701)
+StakedEXATest:testHandlerDeposit(uint80) (runs: 256, μ: 800318, ~: 810889)
+StakedEXATest:testHandlerHarvest(uint64) (runs: 256, μ: 333366, ~: 332862)
+StakedEXATest:testHandlerNotifyRewardAmount(uint64) (runs: 256, μ: 128714, ~: 124469)
+StakedEXATest:testHandlerSetDuration(uint32) (runs: 256, μ: 147177, ~: 163906)
+StakedEXATest:testHandlerWithdraw(uint256) (runs: 256, μ: 69995, ~: 70002)
 StakedEXATest:testHarvest() (gas: 197912)
 StakedEXATest:testHarvestAmountWithReducedAllowance() (gas: 215330)
-StakedEXATest:testHarvestEffectOnRewardData() (gas: 190958)
+StakedEXATest:testHarvestEffectOnRewardData() (gas: 190914)
 StakedEXATest:testHarvestEmitsRewardAmountNotified() (gas: 189043)
 StakedEXATest:testHarvestZero() (gas: 236747)
-StakedEXATest:testInitialValues() (gas: 89162)
-StakedEXATest:testInsufficientBalanceError(uint256) (runs: 256, μ: 65339, ~: 65475)
-StakedEXATest:testMultipleClaimsVsOne() (gas: 25924766)
-StakedEXATest:testMultipleHarvests() (gas: 462138)
-StakedEXATest:testNoRewardsAfterPeriod(uint256) (runs: 256, μ: 1561373, ~: 1567865)
+StakedEXATest:testInitialValues() (gas: 89074)
+StakedEXATest:testInsufficientBalanceError(uint256) (runs: 256, μ: 65328, ~: 65453)
+StakedEXATest:testMultipleClaimsVsOne() (gas: 25922257)
+StakedEXATest:testMultipleHarvests() (gas: 462094)
+StakedEXATest:testNoRewardsAfterPeriod(uint256) (runs: 256, μ: 1561357, ~: 1567513)
 StakedEXATest:testNotPausingRoleError() (gas: 39503)
-StakedEXATest:testNotifyRewardAmount(uint256,uint256) (runs: 256, μ: 131202, ~: 131131)
-StakedEXATest:testNotifyRewardWithUnderlyingAsset() (gas: 502167)
-StakedEXATest:testOnlyAdminEnableReward() (gas: 1196209)
-StakedEXATest:testOnlyAdminFinishDistribution() (gas: 190273)
+StakedEXATest:testNotifyRewardAmount(uint256,uint256) (runs: 256, μ: 131151, ~: 131086)
+StakedEXATest:testNotifyRewardWithUnderlyingAsset() (gas: 502122)
+StakedEXATest:testOnlyAdminEnableReward() (gas: 1195947)
+StakedEXATest:testOnlyAdminFinishDistribution() (gas: 190229)
 StakedEXATest:testOnlyAdminNotifyRewardAmount() (gas: 204586)
-StakedEXATest:testOnlyAdminSetProvider() (gas: 143679)
-StakedEXATest:testOnlyAdminSetProviderRatio() (gas: 143317)
-StakedEXATest:testOnlyAdminSetRewardsDuration() (gas: 152934)
-StakedEXATest:testOnlyAdminSetSavings() (gas: 141010)
-StakedEXATest:testPausable() (gas: 1156205)
-StakedEXATest:testPausableClaim() (gas: 639452)
-StakedEXATest:testPausableHarvest() (gas: 344637)
-StakedEXATest:testPauserCanPauseUnpause() (gas: 157810)
+StakedEXATest:testOnlyAdminSetProvider() (gas: 143570)
+StakedEXATest:testOnlyAdminSetProviderRatio() (gas: 143217)
+StakedEXATest:testOnlyAdminSetRewardsDuration() (gas: 152956)
+StakedEXATest:testOnlyAdminSetSavings() (gas: 140988)
+StakedEXATest:testPausable() (gas: 1156228)
+StakedEXATest:testPausableClaim() (gas: 639652)
+StakedEXATest:testPausableHarvest() (gas: 344615)
+StakedEXATest:testPauserCanPauseUnpause() (gas: 157943)
 StakedEXATest:testPenaltyGrowthRange() (gas: 67189)
 StakedEXATest:testPenaltyThresholdRange() (gas: 37134)
-StakedEXATest:testPermitAndDeposit() (gas: 373442)
-StakedEXATest:testRefTimeRange() (gas: 41436)
-StakedEXATest:testResetDepositAfterRefTime(uint256) (runs: 256, μ: 1015616, ~: 1015278)
-StakedEXATest:testRewardAmountNotifiedEvent(uint256) (runs: 256, μ: 105824, ~: 106665)
+StakedEXATest:testPermitAndDeposit() (gas: 373398)
+StakedEXATest:testResetDepositAfterRefTime(uint256) (runs: 256, μ: 1015560, ~: 1015260)
+StakedEXATest:testRewardAmountNotifiedEvent(uint256) (runs: 256, μ: 105811, ~: 106665)
 StakedEXATest:testRewardNotListedError() (gas: 1111868)
-StakedEXATest:testRewardPaidEvent(uint256,uint256) (runs: 256, μ: 808591, ~: 752582)
-StakedEXATest:testRewardsAmounts(uint256) (runs: 256, μ: 1568469, ~: 1568055)
-StakedEXATest:testRewardsDurationSetEvent(uint40) (runs: 256, μ: 52051, ~: 52034)
-StakedEXATest:testSetDuration(uint256,uint40) (runs: 256, μ: 59013, ~: 59283)
-StakedEXATest:testSetExcessFactor() (gas: 81904)
-StakedEXATest:testSetMarketOnlyAdmin() (gas: 1264147)
-StakedEXATest:testSetMinTime() (gas: 81993)
-StakedEXATest:testSetPenaltyGrowth() (gas: 82225)
-StakedEXATest:testSetPenaltyThreshold() (gas: 82022)
-StakedEXATest:testSetProviderRatioOverOneError() (gas: 37267)
-StakedEXATest:testSetProviderZeroAddressError() (gas: 37131)
-StakedEXATest:testSetRefTime() (gas: 84032)
-StakedEXATest:testSetSavingsZeroAddressError() (gas: 37284)
-StakedEXATest:testTotalSupplyDeposit(uint80) (runs: 256, μ: 355322, ~: 362382)
-StakedEXATest:testTotalSupplyWithdraw(uint256) (runs: 256, μ: 62061, ~: 62068)
-StakedEXATest:testUntransferable(uint80) (runs: 256, μ: 374940, ~: 382901)
-StakedEXATest:testWithdrawEvent(uint256) (runs: 256, μ: 521038, ~: 520716)
-StakedEXATest:testWithdrawSameAmountRewardsShouldEqual(uint256,uint256) (runs: 256, μ: 1066883, ~: 1132708)
-StakedEXATest:testWithdrawWithRewards(uint256) (runs: 256, μ: 874769, ~: 874447)
+StakedEXATest:testRewardPaidEvent(uint256,uint256) (runs: 256, μ: 811350, ~: 868991)
+StakedEXATest:testRewardsAmounts(uint256) (runs: 256, μ: 1568305, ~: 1567893)
+StakedEXATest:testRewardsDurationSetEvent(uint40) (runs: 256, μ: 52052, ~: 52034)
+StakedEXATest:testSetDuration(uint256,uint40) (runs: 256, μ: 58997, ~: 59238)
+StakedEXATest:testSetMarketOnlyAdmin() (gas: 1264125)
+StakedEXATest:testSetMinTime() (gas: 81971)
+StakedEXATest:testSetPenaltyGrowth() (gas: 82247)
+StakedEXATest:testSetPenaltyThreshold() (gas: 82066)
+StakedEXATest:testSetProviderRatioOverOneError() (gas: 37134)
+StakedEXATest:testSetProviderZeroAddressError() (gas: 37153)
+StakedEXATest:testSetSavingsZeroAddressError() (gas: 37262)
+StakedEXATest:testTotalSupplyDeposit(uint80) (runs: 256, μ: 355346, ~: 362404)
+StakedEXATest:testTotalSupplyWithdraw(uint256) (runs: 256, μ: 61950, ~: 61957)
+StakedEXATest:testUntransferable(uint80) (runs: 256, μ: 374898, ~: 382857)
+StakedEXATest:testWithdrawEvent(uint256) (runs: 256, μ: 521026, ~: 520730)
+StakedEXATest:testWithdrawSameAmountRewardsShouldEqual(uint256,uint256) (runs: 256, μ: 1070258, ~: 1132756)
+StakedEXATest:testWithdrawWithRewards(uint256) (runs: 256, μ: 874713, ~: 874417)
 StakedEXATest:testZeroRateError() (gas: 59267)
-StakingPreviewerTest:testAllClaimable() (gas: 431950)
-StakingPreviewerTest:testAllClaimed() (gas: 630932)
-StakingPreviewerTest:testAllEarned() (gas: 317080)
-StakingPreviewerTest:testAllRewards() (gas: 448808)
-StakingPreviewerTest:testStaking() (gas: 502542)
+StakingPreviewerTest:testAllClaimable() (gas: 431576)
+StakingPreviewerTest:testAllClaimed() (gas: 630910)
+StakingPreviewerTest:testAllEarned() (gas: 316706)
+StakingPreviewerTest:testAllRewards() (gas: 448258)
+StakingPreviewerTest:testStaking() (gas: 501992)
 SwapperTest:testSwapBasic() (gas: 216831)
 SwapperTest:testSwapWithAllowance() (gas: 481530)
 SwapperTest:testSwapWithInaccurateSlippageSendsETHToAccount() (gas: 297968)
diff --git a/contracts/StakedEXA.sol b/contracts/StakedEXA.sol
index 3462b41a..11801433 100644
--- a/contracts/StakedEXA.sol
+++ b/contracts/StakedEXA.sol
@@ -50,9 +50,9 @@ contract StakedEXA is
 
   /// @notice Minimum time to stake and get rewards.
   uint256 public minTime;
-  /// @notice Reference period to stake and get full rewards.
+  /// @notice Reference period to stake and get full rewards. Not possible to change after initilization.
   uint256 public refTime;
-  /// @notice Discount factor for excess exposure.
+  /// @notice Discount factor for excess exposure. Not possible to change after initilization.
   uint256 public excessFactor;
   /// @notice Penalty growth factor.
   uint256 public penaltyGrowth;
@@ -94,9 +94,10 @@ contract StakedEXA is
 
     _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
 
+    if (p.refTime == 0 || p.refTime <= p.minTime || p.excessFactor > 1e18) revert InvalidRange();
     setMinTime(p.minTime);
-    setRefTime(p.refTime);
-    setExcessFactor(p.excessFactor);
+    refTime = p.refTime;
+    excessFactor = p.excessFactor;
     setPenaltyGrowth(p.penaltyGrowth);
     setPenaltyThreshold(p.penaltyThreshold);
 
@@ -492,22 +493,6 @@ contract StakedEXA is
     emit MinTimeSet(minTime_, msg.sender);
   }
 
-  /// @notice Sets the reference time to stake for full rewards.
-  /// @param refTime_ The new reference time.
-  function setRefTime(uint256 refTime_) public onlyRole(DEFAULT_ADMIN_ROLE) {
-    if (refTime_ < minTime || refTime_ == 0) revert InvalidRange();
-    refTime = refTime_;
-    emit RefTimeSet(refTime_, msg.sender);
-  }
-
-  /// @notice Sets the excess factor.
-  /// @param excessFactor_ The new excess factor.
-  function setExcessFactor(uint256 excessFactor_) public onlyRole(DEFAULT_ADMIN_ROLE) {
-    if (excessFactor_ > 1e18) revert InvalidRange();
-    excessFactor = excessFactor_;
-    emit ExcessFactorSet(excessFactor_, msg.sender);
-  }
-
   /// @notice Sets the penalty growth factor.
   /// @param penaltyGrowth_ The new penalty growth factor.
   function setPenaltyGrowth(uint256 penaltyGrowth_) public onlyRole(DEFAULT_ADMIN_ROLE) {
@@ -557,7 +542,6 @@ contract StakedEXA is
     return "mode=timestamp";
   }
 
-  event ExcessFactorSet(uint256 excessFactor, address indexed account);
   event MarketSet(Market indexed market, address indexed account);
   event MinTimeSet(uint256 minTime, address indexed account);
   event PenaltyGrowthSet(uint256 penaltyGrowth, address indexed account);
diff --git a/test/StakedEXA.t.sol b/test/StakedEXA.t.sol
index 2659513b..485d6cf0 100644
--- a/test/StakedEXA.t.sol
+++ b/test/StakedEXA.t.sol
@@ -1462,20 +1462,6 @@ contract StakedEXATest is Test {
     stEXA.notifyRewardAmount(exa, assets);
   }
 
-  function testSetExcessFactor() external {
-    uint256 factor = 0.7e18;
-
-    address nonAdmin = address(0x1);
-    vm.prank(nonAdmin);
-    vm.expectRevert(abi.encodeWithSelector(IAccessControl.AccessControlUnauthorizedAccount.selector, nonAdmin, 0));
-    stEXA.setExcessFactor(factor);
-
-    vm.expectEmit(true, true, true, true, address(stEXA));
-    emit StakedEXA.ExcessFactorSet(factor, address(this));
-    stEXA.setExcessFactor(factor);
-    assertEq(stEXA.excessFactor(), factor);
-  }
-
   function testSetMinTime() external {
     uint256 time = 1 days;
 
@@ -1518,20 +1504,6 @@ contract StakedEXATest is Test {
     assertEq(stEXA.penaltyThreshold(), threshold);
   }
 
-  function testSetRefTime() external {
-    uint256 time = 2 weeks;
-
-    address nonAdmin = address(0x1);
-    vm.prank(nonAdmin);
-    vm.expectRevert(abi.encodeWithSelector(IAccessControl.AccessControlUnauthorizedAccount.selector, nonAdmin, 0));
-    stEXA.setRefTime(time);
-
-    vm.expectEmit(true, true, true, true, address(stEXA));
-    emit StakedEXA.RefTimeSet(time, address(this));
-    stEXA.setRefTime(time);
-    assertEq(stEXA.refTime(), time);
-  }
-
   function testResetDepositAfterRefTime(uint256 assets) external {
     assets = _bound(assets, 1, type(uint80).max);
     uint256 start = block.timestamp * 1e18;
@@ -1583,16 +1555,6 @@ contract StakedEXATest is Test {
     assertEq(rA.balanceOf(address(this)) - balanceBefore, rClaimable, "balanceBefore != rClaimable");
   }
 
-  function testRefTimeRange() external {
-    vm.expectRevert(InvalidRange.selector);
-    stEXA.setRefTime(minTime - 1);
-  }
-
-  function testExcessFactorRange() external {
-    vm.expectRevert(InvalidRange.selector);
-    stEXA.setExcessFactor(1e18 + 1);
-  }
-
   function testPenaltyGrowthRange() external {
     vm.expectRevert(InvalidRange.selector);
     stEXA.setPenaltyGrowth(100e18 + 1);