diff --git a/feature/auth/captcha/src/main/kotlin/com/meloda/app/fast/auth/captcha/CaptchaViewModel.kt b/feature/auth/captcha/src/main/kotlin/com/meloda/app/fast/auth/captcha/CaptchaViewModel.kt
index 3187699f..5bb6a48b 100644
--- a/feature/auth/captcha/src/main/kotlin/com/meloda/app/fast/auth/captcha/CaptchaViewModel.kt
+++ b/feature/auth/captcha/src/main/kotlin/com/meloda/app/fast/auth/captcha/CaptchaViewModel.kt
@@ -10,6 +10,7 @@ import com.meloda.app.fast.common.extensions.updateValue
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.update
+import java.net.URLDecoder
 
 interface CaptchaViewModel {
     val screenState: StateFlow<CaptchaScreenState>
@@ -37,7 +38,7 @@ class CaptchaViewModelImpl(
         screenState.setValue { old ->
             old.copy(
                 captchaSid = arguments.captchaSid,
-                captchaImage = arguments.captchaImage
+                captchaImage = URLDecoder.decode(arguments.captchaImage, "utf-8")
             )
         }
     }
diff --git a/feature/auth/src/main/kotlin/com/meloda/app/fast/auth/AuthGraph.kt b/feature/auth/src/main/kotlin/com/meloda/app/fast/auth/AuthGraph.kt
index d80bd51c..144f5ccf 100644
--- a/feature/auth/src/main/kotlin/com/meloda/app/fast/auth/AuthGraph.kt
+++ b/feature/auth/src/main/kotlin/com/meloda/app/fast/auth/AuthGraph.kt
@@ -38,7 +38,7 @@ fun NavGraphBuilder.authNavGraph(
                 navController.navigateToCaptcha(
                     CaptchaArguments(
                         arguments.captchaSid,
-                        arguments.captchaImage
+                        URLEncoder.encode(arguments.captchaImage, "utf-8")
                     )
                 )
             },