diff --git a/app/upgrades/v0.0.12.go b/app/upgrades/v0.0.12.go
new file mode 100644
index 000000000..3eb6bd2ca
--- /dev/null
+++ b/app/upgrades/v0.0.12.go
@@ -0,0 +1,90 @@
+package upgrades
+
+import (
+	"context"
+
+	"cosmossdk.io/math"
+	storetypes "cosmossdk.io/store/types"
+	upgradetypes "cosmossdk.io/x/upgrade/types"
+	cosmosTypes "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/types/module"
+	"github.com/pokt-network/poktroll/app/keepers"
+	suppliertypes "github.com/pokt-network/poktroll/x/supplier/types"
+)
+
+// Upgrade_0_0_12 is the upgrade handler for v0.0.12 upgrade.
+//   - Before: v0.0.11
+//   - After: v0.0.12
+
+// TODO_IN_THIS_PR: WIP. Using this diff as a starting point: https://github.com/pokt-network/poktroll/compare/v0.0.11...feat/proof-endblocker
+// TODO_IN_THIS_PR: Wait for https://github.com/pokt-network/poktroll/pull/1042
+var Upgrade_0_0_12 = Upgrade{
+	PlanName: "v0.0.12",
+	CreateUpgradeHandler: func(mm *module.Manager,
+		keepers *keepers.Keepers,
+		configurator module.Configurator,
+	) upgradetypes.UpgradeHandler {
+		// Adds new parameters using ignite's config.yml as a reference. Assuming we don't need any other parameters.
+		applyNewParameters := func(ctx context.Context) (err error) {
+			logger := cosmosTypes.UnwrapSDKContext(ctx).Logger()
+			logger.Info("Starting parameter updates for v0.0.12")
+
+			// Add supplier module staking_fee. The min stake is set to 1000000 upokt, but we avoid GetParams() to avoid
+			// potential protobuf issues.
+			// Validate with: `poktrolld q supplier params --node=https://testnet-validated-validator-rpc.poktroll.com/`
+			supplierParams := suppliertypes.Params{
+				MinStake: &cosmosTypes.Coin{
+					Denom:  "upokt",
+					Amount: math.NewInt(1000000),
+				},
+				StakingFee: &cosmosTypes.Coin{
+					Denom: "upokt",
+					// TODO_IN_THIS_PR: 100upokt a good value?
+					Amount: math.NewInt(100),
+				},
+			}
+
+			// ALL parameters must be present when setting params.
+			err = keepers.SupplierKeeper.SetParams(ctx, supplierParams)
+			if err != nil {
+				logger.Error("Failed to set supplier params", "error", err)
+				return err
+			}
+			logger.Info("Successfully updated supplier params", "new_params", supplierParams)
+
+			// TODO_IN_THIS_PR: RevSharePercent / DefaultRevSharePercent has been changed from float32 to uint64.
+			// Investigate the impact of this change on existing on-chain data.
+			// As v0.0.12 in it's current state only has protobufs with `uint64`, we might need to write a module migration
+			// and maintain two versions of protobuf files IF we need to loop through existing suppliers and update their onchain
+			// data.
+
+			// TODO_IN_THIS_PR: Add service.params.target_num_relays.
+			// TODO_IN_THIS_PR: Add tokenomics.params.global_inflation_per_claim.
+			return
+		}
+
+		// Returns the upgrade handler for v0.0.12
+		return func(ctx context.Context, plan upgradetypes.Plan, vm module.VersionMap) (module.VersionMap, error) {
+			logger := cosmosTypes.UnwrapSDKContext(ctx).Logger()
+			logger.Info("Starting v0.0.12 upgrade handler")
+
+			err := applyNewParameters(ctx)
+			if err != nil {
+				logger.Error("Failed to apply new parameters", "error", err)
+				return vm, err
+			}
+
+			logger.Info("Running module migrations")
+			vm, err = mm.RunMigrations(ctx, configurator, vm)
+			if err != nil {
+				logger.Error("Failed to run migrations", "error", err)
+				return vm, err
+			}
+
+			logger.Info("Successfully completed v0.0.12 upgrade handler")
+			return vm, nil
+		}
+	},
+	// No changes to the KVStore in this upgrade.
+	StoreUpgrades: storetypes.StoreUpgrades{},
+}