diff --git a/go.mod b/go.mod
index 28f63ae..b507d78 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,7 @@ module server_torii
 
 go 1.23.5
 
-require gopkg.in/yaml.v3 v3.0.1
+require (
+	github.com/mssola/useragent v1.0.0
+	gopkg.in/yaml.v3 v3.0.1
+)
diff --git a/internal/check/Captcha.go b/internal/check/Captcha.go
index 2af70aa..d56db0f 100644
--- a/internal/check/Captcha.go
+++ b/internal/check/Captcha.go
@@ -12,6 +12,7 @@ import (
 	"server_torii/internal/action"
 	"server_torii/internal/config"
 	"server_torii/internal/dataType"
+	"server_torii/internal/utils"
 	"strconv"
 	"strings"
 	"time"
@@ -96,7 +97,7 @@ func CheckCaptcha(r *http.Request, reqData dataType.UserRequest, ruleSet *config
 func GenClearance(reqData dataType.UserRequest, ruleSet config.RuleSet) []byte {
 	timeNow := time.Now().Unix()
 	mac := hmac.New(sha512.New, []byte(ruleSet.CAPTCHARule.SecretKey))
-	mac.Write([]byte(fmt.Sprintf("%d%s%sCAPTCHA-CLEARANCE", timeNow, reqData.Host, reqData.UserAgent)))
+	mac.Write([]byte(fmt.Sprintf("%d%s%sCAPTCHA-CLEARANCE", timeNow, reqData.Host, utils.GetClearanceUserAgent(reqData.UserAgent))))
 	return []byte(fmt.Sprintf("%s:%s", fmt.Sprintf("%d", time.Now().Unix()), fmt.Sprintf("%x", mac.Sum(nil))))
 }
 
@@ -123,7 +124,7 @@ func verifyClearanceCookie(reqData dataType.UserRequest, ruleSet config.RuleSet)
 	}
 
 	mac := hmac.New(sha512.New, []byte(ruleSet.CAPTCHARule.SecretKey))
-	mac.Write([]byte(fmt.Sprintf("%d%s%sCAPTCHA-CLEARANCE", parsedTimestamp, reqData.Host, reqData.UserAgent)))
+	mac.Write([]byte(fmt.Sprintf("%d%s%sCAPTCHA-CLEARANCE", parsedTimestamp, reqData.Host, utils.GetClearanceUserAgent(reqData.UserAgent))))
 	computedHash := fmt.Sprintf("%x", mac.Sum(nil))
 
 	return hmac.Equal([]byte(computedHash), []byte(expectedHash))
diff --git a/internal/utils/UAParser.go b/internal/utils/UAParser.go
new file mode 100644
index 0000000..f8dc088
--- /dev/null
+++ b/internal/utils/UAParser.go
@@ -0,0 +1,21 @@
+package utils
+
+import (
+	"fmt"
+	"github.com/mssola/useragent"
+)
+
+func GetClearanceUserAgent(inputUA string) string {
+	if len(inputUA) < 8 || inputUA[:8] != "Mozilla/" {
+		return inputUA
+	}
+
+	ua := useragent.New(inputUA)
+
+	engin, enginVersion := ua.Engine()
+	browser, browserVersion := ua.Browser()
+
+	ret := fmt.Sprintf("Mozilla:%v,Module:%v,Platform:%v,OS:%v,Engine:%v,EngineVersion:%v,Browser:%v,BrowserVersion:%v", ua.Mozilla(), ua.Model(), ua.Platform(), ua.OS(), engin, enginVersion, browser, browserVersion)
+	return ret
+
+}