diff --git a/CHANGELOG.md b/CHANGELOG.md
index 58899e8f..9da4900f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## v1.21.0
+* Quebec protocol support
+
 ## v1.19.2
 * Update Parisnet hash
 * Update protocol history of ghostnet
diff --git a/README.md b/README.md
index 92013ba0..613688f2 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,8 @@ TzGo's main focus is on **correctness**, **stability**, and **compliance** with
 
 Current Tezos protocol support in TzGo
 
+- Quebec v021
+- ParisC v020
 - Paris v019
 - Oxford v018
 - Nairobi v017
diff --git a/tezos/params.go b/tezos/params.go
index ef0cc56d..853a1f62 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,
+		MinimalBlockDelay:            4 * time.Second,
 		CostPerByte:                  250,
 		OriginationSize:              257,
 		HardGasLimitPerOperation:     1040000,
-		HardGasLimitPerBlock:         1733333,
+		HardGasLimitPerBlock:         1386666,
 		HardStorageLimitPerOperation: 60000,
 		MaxOperationDataLength:       32768,
-		MaxOperationsTTL:             360,
+		MaxOperationsTTL:             450,
 	}).
 		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,
-		HardStorageLimitPerOperation: 60000,
-		MaxOperationDataLength:       32768,
-		MaxOperationsTTL:             360,
-	}).
-		WithChainId(Parisnet).
-		WithDeployment(Deployments[Parisnet].AtProtocol(ProtoV019))
+		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 3152c290..a4fe4af5 100644
--- a/tezos/protocols.go
+++ b/tezos/protocols.go
@@ -27,6 +27,7 @@ var (
 	ProtoV018      = MustParseProtocolHash("ProxfordYmVfjWnRcgjWH36fW6PArwqykTFzotUxRs6gmTcZDuH")
 	ProtoV019      = MustParseProtocolHash("PtParisBxoLz5gzMmn3d9WBQNoPSZakgnkMC2VNuQ3KXfUtUQeZ")
 	ProtoV020      = MustParseProtocolHash("PsParisCZo7KAh1Z1smVd9ZMZ1HHn5gkzbM94V3PLCpknFWhUAi")
+	ProtoV021      = MustParseProtocolHash("PsQuebecnLByd3JwTiGadoG4nGWi3HYiLXUjkibeFV8dCFeVMUg")
 
 	// aliases
 	PtAthens  = ProtoV004
@@ -46,11 +47,10 @@ var (
 	Proxford  = ProtoV018
 	PtParisB  = ProtoV019
 	PsParisC  = ProtoV020
+	PsQuebec  = ProtoV021
 
-	Mainnet   = MustParseChainIdHash("NetXdQprcVkpaWU")
-	Ghostnet  = MustParseChainIdHash("NetXnHfVqm9iesp")
-	Parisnet  = MustParseChainIdHash("NetXR64bNAYkP4S")
-	ParisCnet = MustParseChainIdHash("NetXXWAHLEvre9b")
+	Mainnet  = MustParseChainIdHash("NetXdQprcVkpaWU")
+	Ghostnet = MustParseChainIdHash("NetXnHfVqm9iesp")
 
 	Versions = map[ProtocolHash]int{
 		ProtoGenesis:   0,
@@ -75,7 +75,8 @@ var (
 		ProtoV018:      18,
 		ProtoV019:      19,
 		ProtoV020:      20,
-		ProtoAlpha:     21,
+		ProtoV021:      21,
+		ProtoAlpha:     22,
 	}
 
 	Deployments = map[ChainIdHash]ProtocolHistory{
@@ -101,32 +102,23 @@ var (
 			{PtNairobi, 0, 3760129, 5070848, 623, 5, 16384, 1024}, // v17
 			{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},      // v19
+			{PsParisC, 0, 5898241, 7692288, 750, 2, 24576, 24576}, // v20
+			{PsQuebec, 0, 7692289, -1, 823, 2, 30720, 30720},      // v21
 		},
 		Ghostnet: {
-			{ProtoGenesis, 0, 0, 0, 0, 3, 4096, 256},               // 0
-			{ProtoBootstrap, 0, 1, 1, 0, 3, 4096, 256},             // 0
-			{PtHangz2, 2, 2, 8191, 0, 3, 4096, 256},                // v11
-			{Psithaca, 0, 8192, 765952, 2, 3, 4096, 256},           // v12
-			{PtJakart, 0, 765953, 1191936, 187, 3, 4096, 256},      // v13
-			{PtKathma, 0, 1191937, 1654784, 291, 3, 4096, 256},     // v14
-			{PtLimaPt, 0, 1654785, 2162688, 404, 3, 4096, 256},     // v15
-			{PtMumbai, 0, 2162689, 2957312, 528, 3, 8192, 512},     // v16
-			{PtNairobi, 0, 2957313, 5316608, 625, 3, 8192, 512},    // v17
-			{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},      // v19
-		},
-		Parisnet: {
-			{ProtoGenesis, 0, 0, 0, 0, 3, 8192, 512},    // 0
-			{ProtoBootstrap, 0, 1, 1, 0, 3, 8192, 512},  // 0
-			{Proxford, 2, 2, 8192, 0, 3, 8192, 512},     // v18
-			{PtParisB, 0, 8193, -1, 1, 2, 12288, 12288}, // v19
-		},
-		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
+			{ProtoGenesis, 0, 0, 0, 0, 3, 4096, 256},                // 0
+			{ProtoBootstrap, 0, 1, 1, 0, 3, 4096, 256},              // 0
+			{PtHangz2, 2, 2, 8191, 0, 3, 4096, 256},                 // v11
+			{Psithaca, 0, 8192, 765952, 2, 3, 4096, 256},            // v12
+			{PtJakart, 0, 765953, 1191936, 187, 3, 4096, 256},       // v13
+			{PtKathma, 0, 1191937, 1654784, 291, 3, 4096, 256},      // v14
+			{PtLimaPt, 0, 1654785, 2162688, 404, 3, 4096, 256},      // v15
+			{PtMumbai, 0, 2162689, 2957312, 528, 3, 8192, 512},      // v16
+			{PtNairobi, 0, 2957313, 5316608, 625, 3, 8192, 512},     // v17
+			{Proxford, 0, 5316609, 6422528, 913, 3, 8192, 512},      // v18
+			{PtParisB, 0, 6422529, 6729728, 1048, 2, 12288, 12288},  // v19
+			{PsParisC, 0, 6729729, 10047488, 1073, 2, 12288, 12288}, // v20
+			{PsQuebec, 0, 10047489, -1, 1343, 2, 15360, 15360},      // v21
 		},
 	}
 )