diff --git a/client/broadcast.go b/client/broadcast.go
index 5598cbcebaa1..bc5f65d8f2e9 100644
--- a/client/broadcast.go
+++ b/client/broadcast.go
@@ -78,6 +78,13 @@ func CheckCometError(err error, tx cmttypes.Tx) *sdk.TxResponse {
 			TxHash:    txHash,
 		}
 
+	case strings.Contains(errStr, "mempool rate limit exceeded"):
+		return &sdk.TxResponse{
+			Code:      sdkerrors.ErrMempoolRateLimitExceeded.ABCICode(),
+			Codespace: sdkerrors.ErrMempoolRateLimitExceeded.Codespace(),
+			TxHash:    txHash,
+		}
+
 	default:
 		return nil
 	}
diff --git a/client/broadcast_test.go b/client/broadcast_test.go
index fcd7d1d604ac..248ba3a31451 100644
--- a/client/broadcast_test.go
+++ b/client/broadcast_test.go
@@ -39,9 +39,10 @@ func CreateContextWithErrorAndMode(err error, mode string) Context {
 // Test the correct code is returned when
 func TestBroadcastError(t *testing.T) {
 	errors := map[error]uint32{
-		mempool.ErrTxInCache:       sdkerrors.ErrTxInMempoolCache.ABCICode(),
-		mempool.ErrTxTooLarge{}:    sdkerrors.ErrTxTooLarge.ABCICode(),
-		mempool.ErrMempoolIsFull{}: sdkerrors.ErrMempoolIsFull.ABCICode(),
+		mempool.ErrTxInCache:                  sdkerrors.ErrTxInMempoolCache.ABCICode(),
+		mempool.ErrTxTooLarge{}:               sdkerrors.ErrTxTooLarge.ABCICode(),
+		mempool.ErrMempoolIsFull{}:            sdkerrors.ErrMempoolIsFull.ABCICode(),
+		mempool.ErrMempoolRateLimitExceeded{}: sdkerrors.ErrMempoolRateLimitExceeded.ABCICode(),
 	}
 
 	modes := []string{
diff --git a/errors/errors_test.go b/errors/errors_test.go
index 48a978c8f3b7..57a8f5d229b5 100644
--- a/errors/errors_test.go
+++ b/errors/errors_test.go
@@ -256,4 +256,6 @@ var (
 	ErrNotSupported            = RegisterWithGRPCCode(testCodespace, 37, codes.Unimplemented, "feature not supported")
 	ErrNotFound                = RegisterWithGRPCCode(testCodespace, 38, codes.NotFound, "not found")
 	ErrIO                      = Register(testCodespace, 39, "Internal IO error")
+
+	ErrMempoolRateLimitExceeded = Register(testCodespace, 10001, "mempool rate limit exceeded")
 )
diff --git a/go.mod b/go.mod
index 6ad6f2c94e3d..a5a79daa77df 100644
--- a/go.mod
+++ b/go.mod
@@ -175,7 +175,7 @@ require (
 // replace the store module with the b-harvest fork
 replace (
 	cosmossdk.io/store => github.com/b-harvest/cosmos-sdk/store v0.0.0-20241219054141-7fb019ef389e
-	github.com/cometbft/cometbft => github.com/b-harvest/cometbft v0.0.0-20250114065503-2209f5c8c820
+	github.com/cometbft/cometbft => github.com/b-harvest/cometbft v0.0.0-20250117081724-782b0da6a158
 )
 
 // Below are the long-lived replace of the Cosmos SDK
diff --git a/go.sum b/go.sum
index c5b6fe3387f5..46c190bfc360 100644
--- a/go.sum
+++ b/go.sum
@@ -56,8 +56,8 @@ github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a/go.mod h1:DAHtR1m6l
 github.com/aws/aws-lambda-go v1.13.3/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQwij/eHl5CU=
 github.com/aws/aws-sdk-go v1.27.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
-github.com/b-harvest/cometbft v0.0.0-20250114065503-2209f5c8c820 h1:HSi5iZWa3bzjmJuVMXHSgHr5rxzpGyuaCTkEici0S+8=
-github.com/b-harvest/cometbft v0.0.0-20250114065503-2209f5c8c820/go.mod h1:a8NBI2IdO283RZdpH0MuXlze3j+lv6PXuzOtTCq4YGE=
+github.com/b-harvest/cometbft v0.0.0-20250117081724-782b0da6a158 h1:08cYQa2CGagj4QX8toaCuVobI0CxpEwF3WS+S7LNIqU=
+github.com/b-harvest/cometbft v0.0.0-20250117081724-782b0da6a158/go.mod h1:a8NBI2IdO283RZdpH0MuXlze3j+lv6PXuzOtTCq4YGE=
 github.com/b-harvest/cosmos-sdk/store v0.0.0-20241219054141-7fb019ef389e h1:e5quTVfHOIYOwKiqDZG9euFWjmEtAMu7m9N6PjlXK4Q=
 github.com/b-harvest/cosmos-sdk/store v0.0.0-20241219054141-7fb019ef389e/go.mod h1:8DwVTz83/2PSI366FERGbWSH7hL6sB7HbYp8bqksNwM=
 github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
diff --git a/simapp/go.mod b/simapp/go.mod
index 12275a3d7628..1bab29a436db 100644
--- a/simapp/go.mod
+++ b/simapp/go.mod
@@ -209,7 +209,7 @@ require (
 // replace the store module with the b-harvest fork
 replace (
 	cosmossdk.io/store => github.com/b-harvest/cosmos-sdk/store v0.0.0-20241219054141-7fb019ef389e
-	github.com/cometbft/cometbft => github.com/b-harvest/cometbft v0.0.0-20250114065503-2209f5c8c820
+	github.com/cometbft/cometbft => github.com/b-harvest/cometbft v0.0.0-20250117081724-782b0da6a158
 )
 
 // Below are the long-lived replace of the SimApp
diff --git a/simapp/go.sum b/simapp/go.sum
index a66520f66d6f..2d4ecb1ad703 100644
--- a/simapp/go.sum
+++ b/simapp/go.sum
@@ -256,8 +256,8 @@ github.com/aws/aws-sdk-go v1.44.122/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX
 github.com/aws/aws-sdk-go v1.44.224 h1:09CiaaF35nRmxrzWZ2uRq5v6Ghg/d2RiPjZnSgtt+RQ=
 github.com/aws/aws-sdk-go v1.44.224/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
 github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
-github.com/b-harvest/cometbft v0.0.0-20250114065503-2209f5c8c820 h1:HSi5iZWa3bzjmJuVMXHSgHr5rxzpGyuaCTkEici0S+8=
-github.com/b-harvest/cometbft v0.0.0-20250114065503-2209f5c8c820/go.mod h1:a8NBI2IdO283RZdpH0MuXlze3j+lv6PXuzOtTCq4YGE=
+github.com/b-harvest/cometbft v0.0.0-20250117081724-782b0da6a158 h1:08cYQa2CGagj4QX8toaCuVobI0CxpEwF3WS+S7LNIqU=
+github.com/b-harvest/cometbft v0.0.0-20250117081724-782b0da6a158/go.mod h1:a8NBI2IdO283RZdpH0MuXlze3j+lv6PXuzOtTCq4YGE=
 github.com/b-harvest/cosmos-sdk/store v0.0.0-20241219054141-7fb019ef389e h1:e5quTVfHOIYOwKiqDZG9euFWjmEtAMu7m9N6PjlXK4Q=
 github.com/b-harvest/cosmos-sdk/store v0.0.0-20241219054141-7fb019ef389e/go.mod h1:8DwVTz83/2PSI366FERGbWSH7hL6sB7HbYp8bqksNwM=
 github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
diff --git a/types/errors/errors.go b/types/errors/errors.go
index 5e17f2df481a..cca4a675da18 100644
--- a/types/errors/errors.go
+++ b/types/errors/errors.go
@@ -140,6 +140,10 @@ var (
 	// supplied.
 	ErrInvalidGasLimit = errorsmod.Register(RootCodespace, 41, "invalid gas limit")
 
+	// ErrMempoolRateLimitExceeded defines an error when the mempool rate limit is exceeded.
+	// Starting at 10001 for future errors added in the cosmos-sdk.
+	ErrMempoolRateLimitExceeded = errorsmod.Register(RootCodespace, 10001, "mempool rate limit exceeded")
+
 	// ErrPanic should only be set when we recovering from a panic
 	ErrPanic = errorsmod.ErrPanic
 )