diff --git a/go.mod b/go.mod
index b8c6d235..6f2cddaf 100644
--- a/go.mod
+++ b/go.mod
@@ -20,7 +20,7 @@ require (
 	github.com/stretchr/testify v1.10.0
 	github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e
 	github.com/vishvananda/netlink v1.3.1
-	github.com/xtls/reality v0.0.0-20250608065753-4b636d90bde2
+	github.com/xtls/reality v0.0.0-20250608122607-d4826882fcab
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
 	golang.org/x/crypto v0.39.0
 	golang.org/x/net v0.41.0
@@ -35,7 +35,7 @@ require (
 )
 
 // [TODO] Temp: use forked reality until upstream merges #12
-replace github.com/xtls/reality => github.com/meo597/reality v0.0.0-20250608065753-4b636d90bde2
+replace github.com/xtls/reality => github.com/meo597/reality v0.0.0-20250608122607-d4826882fcab
 
 require (
 	github.com/andybalholm/brotli v1.1.0 // indirect
diff --git a/go.sum b/go.sum
index 0eb7e296..afc8d6ce 100644
--- a/go.sum
+++ b/go.sum
@@ -40,8 +40,8 @@ github.com/klauspost/compress v1.17.8 h1:YcnTYrq7MikUT7k0Yb5eceMmALQPYBW/Xltxn0N
 github.com/klauspost/compress v1.17.8/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
 github.com/klauspost/cpuid/v2 v2.2.7 h1:ZWSB3igEs+d0qvnxR/ZBzXVmxkgt8DdzP6m9pfuVLDM=
 github.com/klauspost/cpuid/v2 v2.2.7/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
-github.com/meo597/reality v0.0.0-20250608065753-4b636d90bde2 h1:51SdYH7bCdJ/Nln6UG6aaYEvFw6mr9uCbqhR6Oo/MvQ=
-github.com/meo597/reality v0.0.0-20250608065753-4b636d90bde2/go.mod h1:yD47RN65bDLZgyHWMfFDiqlzrq4usDMt/Xzsk6tMbhw=
+github.com/meo597/reality v0.0.0-20250608122607-d4826882fcab h1:aEcdfNMR3/SFUP2PRvqYeIpHLtta+vvJ2BGwEoS2tHk=
+github.com/meo597/reality v0.0.0-20250608122607-d4826882fcab/go.mod h1:yD47RN65bDLZgyHWMfFDiqlzrq4usDMt/Xzsk6tMbhw=
 github.com/miekg/dns v1.1.66 h1:FeZXOS3VCVsKnEAd+wBkjMC3D2K+ww66Cq3VnCINuJE=
 github.com/miekg/dns v1.1.66/go.mod h1:jGFzBsSNbJw6z1HYut1RKBKHA9PBdxeHrZG8J+gC2WE=
 github.com/onsi/ginkgo/v2 v2.19.0 h1:9Cnnf7UHo57Hy3k6/m5k3dRfGTMXGvxhHFvkDTCTpvA=
diff --git a/infra/conf/transport_internet.go b/infra/conf/transport_internet.go
index 16fc499c..d2a41048 100644
--- a/infra/conf/transport_internet.go
+++ b/infra/conf/transport_internet.go
@@ -486,6 +486,12 @@ func (c *TLSConfig) Build() (proto.Message, error) {
 	return config, nil
 }
 
+type LimitFallback struct {
+	AfterBytes       uint64
+	BytesPerSec      uint64
+	BurstBytesPerSec uint64
+}
+
 type REALITYConfig struct {
 	MasterKeyLog string          `json:"masterKeyLog"`
 	Show         bool            `json:"show"`
@@ -500,12 +506,8 @@ type REALITYConfig struct {
 	MaxTimeDiff  uint64          `json:"maxTimeDiff"`
 	ShortIds     []string        `json:"shortIds"`
 
-	LimitFbUploadRate    float64 `json:"limitFbUploadRate"`
-	LimitFbUploadBurst   int64   `json:"limitFbUploadBurst"`
-	LimitFbUploadAfter   int64   `json:"limitFbUploadAfter"`
-	LimitFbDownloadRate  float64 `json:"limitFbDownloadRate"`
-	LimitFbDownloadBurst int64   `json:"limitFbDownloadBurst"`
-	LimitFbDownloadAfter int64   `json:"limitFbDownloadAfter"`
+	LimitFallbackUpload   LimitFallback `json:"LimitFallbackUpload"`
+	LimitFallbackDownload LimitFallback `json:"LimitFallbackDownload"`
 
 	Fingerprint string `json:"fingerprint"`
 	ServerName  string `json:"serverName"`
@@ -609,13 +611,13 @@ func (c *REALITYConfig) Build() (proto.Message, error) {
 		config.MaxTimeDiff = c.MaxTimeDiff
 
 		config.LimitFallbackUpload = new(reality.LimitFallback)
-		config.LimitFallbackUpload.BytesPerSec = c.LimitFbUploadRate
-		config.LimitFallbackUpload.BurstBytesPerSec = c.LimitFbUploadBurst
-		config.LimitFallbackUpload.AfterBytes = c.LimitFbUploadAfter
+		config.LimitFallbackUpload.BytesPerSec = c.LimitFallbackUpload.BytesPerSec
+		config.LimitFallbackUpload.BurstBytesPerSec = c.LimitFallbackUpload.BurstBytesPerSec
+		config.LimitFallbackUpload.AfterBytes = c.LimitFallbackUpload.AfterBytes
 		config.LimitFallbackDownload = new(reality.LimitFallback)
-		config.LimitFallbackDownload.BytesPerSec = c.LimitFbDownloadRate
-		config.LimitFallbackDownload.BurstBytesPerSec = c.LimitFbDownloadBurst
-		config.LimitFallbackDownload.AfterBytes = c.LimitFbDownloadAfter
+		config.LimitFallbackDownload.BytesPerSec = c.LimitFallbackDownload.BytesPerSec
+		config.LimitFallbackDownload.BurstBytesPerSec = c.LimitFallbackDownload.BurstBytesPerSec
+		config.LimitFallbackDownload.AfterBytes = c.LimitFallbackDownload.AfterBytes
 	} else {
 		config.Fingerprint = strings.ToLower(c.Fingerprint)
 		if config.Fingerprint == "unsafe" || config.Fingerprint == "hellogolang" {
diff --git a/transport/internet/reality/config.go b/transport/internet/reality/config.go
index a776f351..572b9814 100644
--- a/transport/internet/reality/config.go
+++ b/transport/internet/reality/config.go
@@ -33,14 +33,14 @@ func (c *Config) GetREALITYConfig() *reality.Config {
 		KeyLogWriter: KeyLogWriterFromConfig(c),
 	}
 	if c.LimitFallbackUpload != nil {
-		config.LimitFbUploadRate = c.LimitFallbackUpload.BytesPerSec
-		config.LimitFbUploadBurst = c.LimitFallbackUpload.BurstBytesPerSec
-		config.LimitFbUploadAfter = c.LimitFallbackUpload.AfterBytes
+		config.LimitFallbackUpload.BytesPerSec = c.LimitFallbackUpload.BytesPerSec
+		config.LimitFallbackUpload.BurstBytesPerSec = c.LimitFallbackUpload.BurstBytesPerSec
+		config.LimitFallbackUpload.AfterBytes = c.LimitFallbackUpload.AfterBytes
 	}
 	if c.LimitFallbackDownload != nil {
-		config.LimitFbDownloadRate = c.LimitFallbackDownload.BytesPerSec
-		config.LimitFbDownloadBurst = c.LimitFallbackDownload.BurstBytesPerSec
-		config.LimitFbDownloadAfter = c.LimitFallbackDownload.AfterBytes
+		config.LimitFallbackDownload.BytesPerSec = c.LimitFallbackDownload.BytesPerSec
+		config.LimitFallbackDownload.BurstBytesPerSec = c.LimitFallbackDownload.BurstBytesPerSec
+		config.LimitFallbackDownload.AfterBytes = c.LimitFallbackDownload.AfterBytes
 	}
 	config.ServerNames = make(map[string]bool)
 	for _, serverName := range c.ServerNames {
diff --git a/transport/internet/reality/config.pb.go b/transport/internet/reality/config.pb.go
index e756948f..0f0e234d 100644
--- a/transport/internet/reality/config.pb.go
+++ b/transport/internet/reality/config.pb.go
@@ -214,9 +214,9 @@ type LimitFallback struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	BytesPerSec      float64 `protobuf:"fixed64,1,opt,name=bytes_per_sec,json=bytesPerSec,proto3" json:"bytes_per_sec,omitempty"`
-	BurstBytesPerSec int64   `protobuf:"zigzag64,2,opt,name=burst_bytes_per_sec,json=burstBytesPerSec,proto3" json:"burst_bytes_per_sec,omitempty"`
-	AfterBytes       int64   `protobuf:"zigzag64,3,opt,name=after_bytes,json=afterBytes,proto3" json:"after_bytes,omitempty"`
+	BytesPerSec      uint64 `protobuf:"varint,1,opt,name=bytes_per_sec,json=bytesPerSec,proto3" json:"bytes_per_sec,omitempty"`
+	BurstBytesPerSec uint64 `protobuf:"varint,2,opt,name=burst_bytes_per_sec,json=burstBytesPerSec,proto3" json:"burst_bytes_per_sec,omitempty"`
+	AfterBytes       uint64 `protobuf:"varint,3,opt,name=after_bytes,json=afterBytes,proto3" json:"after_bytes,omitempty"`
 }
 
 func (x *LimitFallback) Reset() {
@@ -249,21 +249,21 @@ func (*LimitFallback) Descriptor() ([]byte, []int) {
 	return file_transport_internet_reality_config_proto_rawDescGZIP(), []int{1}
 }
 
-func (x *LimitFallback) GetBytesPerSec() float64 {
+func (x *LimitFallback) GetBytesPerSec() uint64 {
 	if x != nil {
 		return x.BytesPerSec
 	}
 	return 0
 }
 
-func (x *LimitFallback) GetBurstBytesPerSec() int64 {
+func (x *LimitFallback) GetBurstBytesPerSec() uint64 {
 	if x != nil {
 		return x.BurstBytesPerSec
 	}
 	return 0
 }
 
-func (x *LimitFallback) GetAfterBytes() int64 {
+func (x *LimitFallback) GetAfterBytes() uint64 {
 	if x != nil {
 		return x.AfterBytes
 	}
@@ -325,12 +325,12 @@ var file_transport_internet_reality_config_proto_rawDesc = []byte{
 	0x61, 0x63, 0x6b, 0x44, 0x6f, 0x77, 0x6e, 0x6c, 0x6f, 0x61, 0x64, 0x22, 0x83, 0x01, 0x0a, 0x0d,
 	0x4c, 0x69, 0x6d, 0x69, 0x74, 0x46, 0x61, 0x6c, 0x6c, 0x62, 0x61, 0x63, 0x6b, 0x12, 0x22, 0x0a,
 	0x0d, 0x62, 0x79, 0x74, 0x65, 0x73, 0x5f, 0x70, 0x65, 0x72, 0x5f, 0x73, 0x65, 0x63, 0x18, 0x01,
-	0x20, 0x01, 0x28, 0x01, 0x52, 0x0b, 0x62, 0x79, 0x74, 0x65, 0x73, 0x50, 0x65, 0x72, 0x53, 0x65,
+	0x20, 0x01, 0x28, 0x04, 0x52, 0x0b, 0x62, 0x79, 0x74, 0x65, 0x73, 0x50, 0x65, 0x72, 0x53, 0x65,
 	0x63, 0x12, 0x2d, 0x0a, 0x13, 0x62, 0x75, 0x72, 0x73, 0x74, 0x5f, 0x62, 0x79, 0x74, 0x65, 0x73,
-	0x5f, 0x70, 0x65, 0x72, 0x5f, 0x73, 0x65, 0x63, 0x18, 0x02, 0x20, 0x01, 0x28, 0x12, 0x52, 0x10,
+	0x5f, 0x70, 0x65, 0x72, 0x5f, 0x73, 0x65, 0x63, 0x18, 0x02, 0x20, 0x01, 0x28, 0x04, 0x52, 0x10,
 	0x62, 0x75, 0x72, 0x73, 0x74, 0x42, 0x79, 0x74, 0x65, 0x73, 0x50, 0x65, 0x72, 0x53, 0x65, 0x63,
 	0x12, 0x1f, 0x0a, 0x0b, 0x61, 0x66, 0x74, 0x65, 0x72, 0x5f, 0x62, 0x79, 0x74, 0x65, 0x73, 0x18,
-	0x03, 0x20, 0x01, 0x28, 0x12, 0x52, 0x0a, 0x61, 0x66, 0x74, 0x65, 0x72, 0x42, 0x79, 0x74, 0x65,
+	0x03, 0x20, 0x01, 0x28, 0x04, 0x52, 0x0a, 0x61, 0x66, 0x74, 0x65, 0x72, 0x42, 0x79, 0x74, 0x65,
 	0x73, 0x42, 0x7f, 0x0a, 0x23, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72,
 	0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74,
 	0x2e, 0x72, 0x65, 0x61, 0x6c, 0x69, 0x74, 0x79, 0x50, 0x01, 0x5a, 0x34, 0x67, 0x69, 0x74, 0x68,
diff --git a/transport/internet/reality/config.proto b/transport/internet/reality/config.proto
index 9f97f00f..283839d9 100644
--- a/transport/internet/reality/config.proto
+++ b/transport/internet/reality/config.proto
@@ -31,7 +31,7 @@ message Config {
 }
 
 message LimitFallback {
-  double bytes_per_sec = 1;
-  sint64 burst_bytes_per_sec = 2;
-  sint64 after_bytes = 3;
+  uint64 bytes_per_sec = 1;
+  uint64 burst_bytes_per_sec = 2;
+  uint64 after_bytes = 3;
 }