diff --git a/tezos/params.go b/tezos/params.go
index 1ecfdd18..5366def3 100644
--- a/tezos/params.go
+++ b/tezos/params.go
@@ -13,47 +13,32 @@ var (
 	// either overwrite this default or set custom params per operation using
 	// op.WithParams().
 	DefaultParams = (&Params{
-		MinimalBlockDelay:            10 * time.Second,
+		MinimalBlockDelay:            8 * time.Second,
 		CostPerByte:                  250,
 		OriginationSize:              257,
 		HardGasLimitPerOperation:     1040000,
-		HardGasLimitPerBlock:         1733333,
+		HardGasLimitPerBlock:         1386666,
 		HardStorageLimitPerOperation: 60000,
 		MaxOperationDataLength:       32768,
-		MaxOperationsTTL:             360,
+		MaxOperationsTTL:             450,
 	}).
 		WithChainId(Mainnet).
-		WithDeployment(Deployments[Mainnet].AtProtocol(ProtoV019))
+		WithDeployment(Deployments[Mainnet].AtProtocol(ProtoV021))
 
 	// GhostnetParams defines the blockchain configuration for Ghostnet testnet.
 	// To produce compliant transactions, use these defaults in op.WithParams().
 	GhostnetParams = (&Params{
-		MinimalBlockDelay:            8 * time.Second,
-		CostPerByte:                  250,
-		OriginationSize:              257,
-		HardGasLimitPerOperation:     1040000,
-		HardGasLimitPerBlock:         1733333,
-		HardStorageLimitPerOperation: 60000,
-		MaxOperationDataLength:       32768,
-		MaxOperationsTTL:             360,
-	}).
-		WithChainId(Ghostnet).
-		WithDeployment(Deployments[Ghostnet].AtProtocol(ProtoV019))
-
-	// ParisnetParams defines the blockchain configuration for Paris testnet.
-	// To produce compliant transactions, use these defaults in op.WithParams().
-	ParisnetParams = (&Params{
 		MinimalBlockDelay:            5 * time.Second,
 		CostPerByte:                  250,
 		OriginationSize:              257,
 		HardGasLimitPerOperation:     1040000,
-		HardGasLimitPerBlock:         1733333,
+		HardGasLimitPerBlock:         1386666,
 		HardStorageLimitPerOperation: 60000,
 		MaxOperationDataLength:       32768,
-		MaxOperationsTTL:             360,
+		MaxOperationsTTL:             450,
 	}).
-		WithChainId(Parisnet).
-		WithDeployment(Deployments[Parisnet].AtProtocol(ProtoV019))
+		WithChainId(Ghostnet).
+		WithDeployment(Deployments[Ghostnet].AtProtocol(ProtoV021))
 )
 
 // Params contains a subset of protocol configuration settings that are relevant
@@ -111,10 +96,6 @@ func (p *Params) WithChainId(id ChainIdHash) *Params {
 			p.Network = "Mainnet"
 		case Ghostnet:
 			p.Network = "Ghostnet"
-		case Parisnet:
-			p.Network = "Parisnet"
-		case ParisCnet:
-			p.Network = "ParisCnet"
 		}
 	}
 	return p
diff --git a/tezos/protocols.go b/tezos/protocols.go
index be8f8a30..283f5f9a 100644
--- a/tezos/protocols.go
+++ b/tezos/protocols.go
@@ -29,7 +29,7 @@ var (
 	ProtoV018      = MustParseProtocolHash("ProxfordYmVfjWnRcgjWH36fW6PArwqykTFzotUxRs6gmTcZDuH")
 	ProtoV019      = MustParseProtocolHash("PtParisBxoLz5gzMmn3d9WBQNoPSZakgnkMC2VNuQ3KXfUtUQeZ")
 	ProtoV020      = MustParseProtocolHash("PsParisCZo7KAh1Z1smVd9ZMZ1HHn5gkzbM94V3PLCpknFWhUAi")
-	ProtoV021      = MustParseProtocolHash("PsquebeCaYyvBEESCaXL8B8Tn8BcEhps2Zke1xMVtyr7X4qMfxT")
+	ProtoV021      = MustParseProtocolHash("PtQenaB1PqFEfTe2og7bZTaPvMw2CxRyDFEwWNj3GiWp9ba4bJd")
 
 	// aliases
 	PtAthens  = ProtoV004
@@ -49,11 +49,10 @@ var (
 	Proxford  = ProtoV018
 	PtParisB  = ProtoV019
 	PsParisC  = ProtoV020
-	PsQuebec  = ProtoV021
+	PtQenaB1  = ProtoV021
 
-	Mainnet   = MustParseChainIdHash("NetXdQprcVkpaWU")
-	Ghostnet  = MustParseChainIdHash("NetXnHfVqm9iesp")
-	ParisCnet = MustParseChainIdHash("NetXXWAHLEvre9b")
+	Mainnet  = MustParseChainIdHash("NetXdQprcVkpaWU")
+	Ghostnet = MustParseChainIdHash("NetXnHfVqm9iesp")
 
 	versionsMtx = sync.RWMutex{}
 	Versions    = map[ProtocolHash]int{
@@ -107,7 +106,7 @@ var (
 			{Proxford, 0, 5070849, 5726208, 703, 5, 16384, 1024},  // v18
 			{PtParisB, 0, 5726209, 5898240, 743, 2, 24576, 24576}, // v19
 			{PsParisC, 0, 5898241, -1, 750, 2, 24576, 24576},      // v20
-			{PsQuebec, 0, 5898241, -1, 750, 2, 30720, 30720},      // v21
+			{PtQenaB1, 0, 5898241, -1, 750, 2, 30720, 30720},      // v21
 		},
 		Ghostnet: {
 			{ProtoGenesis, 0, 0, 0, 0, 3, 4096, 256},               // 0
@@ -122,12 +121,7 @@ var (
 			{Proxford, 0, 5316609, 6422528, 913, 3, 8192, 512},     // v18
 			{PtParisB, 0, 6422529, 6729728, 1048, 2, 12288, 12288}, // v19
 			{PsParisC, 0, 6729729, -1, 1073, 2, 12288, 12288},      // v20
-			{PsQuebec, 0, 5898241, -1, 750, 2, 30720, 30720},       // v21
-		},
-		ParisCnet: {
-			{ProtoGenesis, 0, 0, 0, 0, 3, 8192, 512},   // 0
-			{ProtoBootstrap, 0, 1, 1, 0, 3, 8192, 512}, // 0
-			{PsParisC, 2, 2, -1, 0, 2, 128, 128},       // v19
+			{PtQenaB1, 0, 5898241, -1, 750, 2, 30720, 30720},       // v21
 		},
 	}
 )