diff --git a/shared/src/commonMain/kotlin/com/bricks/mp/core/BricksHttp.kt b/shared/src/commonMain/kotlin/com/bricks/mp/core/BricksHttp.kt
index ad0ef53..fe9da5e 100644
--- a/shared/src/commonMain/kotlin/com/bricks/mp/core/BricksHttp.kt
+++ b/shared/src/commonMain/kotlin/com/bricks/mp/core/BricksHttp.kt
@@ -5,6 +5,7 @@ import io.ktor.client.engine.cio.*
 import io.ktor.client.plugins.cookies.*
 import io.ktor.client.request.*
 import io.ktor.client.statement.*
+import io.ktor.http.content.FormDataContent
 import io.ktor.http.*
 import kotlinx.serialization.json.*
 
@@ -83,8 +84,7 @@ class BricksHttp(private val context: BricksContext? = null) {
         authToken: String = ""
     ): String {
         val response = client.post(url) {
-            contentType(ContentType.Application.FormUrlEncoded)
-            setBody(form)
+            setBody(FormDataContent(form))
             if (authToken.isNotEmpty()) {
                 header(HttpHeaders.Authorization, "Bearer $authToken")
             }
diff --git a/shared/src/commonMain/kotlin/com/bricks/mp/sage/SageClient.kt b/shared/src/commonMain/kotlin/com/bricks/mp/sage/SageClient.kt
index 7e45661..d72b6e0 100644
--- a/shared/src/commonMain/kotlin/com/bricks/mp/sage/SageClient.kt
+++ b/shared/src/commonMain/kotlin/com/bricks/mp/sage/SageClient.kt
@@ -7,6 +7,7 @@ import io.ktor.client.engine.cio.*
 import io.ktor.client.plugins.cookies.*
 import io.ktor.client.request.*
 import io.ktor.client.statement.*
+import io.ktor.http.content.FormDataContent
 import io.ktor.http.*
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.sync.Mutex
@@ -62,8 +63,7 @@ class SageClient {
             }
 
             val response = client.post(url) {
-                contentType(ContentType.Application.FormUrlEncoded)
-                setBody(formParameters)
+            setBody(FormDataContent(formParameters))
             }
 
             val body = response.bodyAsText()