diff --git a/CrossAppLogin/Back/src/main/kotlin/com/infomaniak/core/crossapplogin/back/internal/deviceinfo/AbstractDeviceInfoUpdateWorker.kt b/CrossAppLogin/Back/src/main/kotlin/com/infomaniak/core/crossapplogin/back/internal/deviceinfo/AbstractDeviceInfoUpdateWorker.kt
index 5aa54c1d5..72c7ed0ec 100644
--- a/CrossAppLogin/Back/src/main/kotlin/com/infomaniak/core/crossapplogin/back/internal/deviceinfo/AbstractDeviceInfoUpdateWorker.kt
+++ b/CrossAppLogin/Back/src/main/kotlin/com/infomaniak/core/crossapplogin/back/internal/deviceinfo/AbstractDeviceInfoUpdateWorker.kt
@@ -44,6 +44,8 @@ import createHttpClient
 import io.ktor.client.HttpClient
 import io.ktor.client.request.post
 import io.ktor.client.request.setBody
+import io.ktor.http.ContentType
+import io.ktor.http.contentType
 import io.ktor.http.isSuccess
 import kotlinx.coroutines.Deferred
 import kotlinx.coroutines.ExperimentalCoroutinesApi
@@ -136,6 +138,7 @@ abstract class AbstractDeviceInfoUpdateWorker(
 
         val url = ApiRoutesCore.sendDeviceInfo()
         val response = httpClient.post(url) {
+            contentType(ContentType.Application.Json)
             setBody(deviceInfo)
         }
         if (response.status.isSuccess()) {
diff --git a/Notifications/Registration/src/main/kotlin/AbstractNotificationsRegistrationWorker.kt b/Notifications/Registration/src/main/kotlin/AbstractNotificationsRegistrationWorker.kt
index 4f03a4072..27ee01d72 100644
--- a/Notifications/Registration/src/main/kotlin/AbstractNotificationsRegistrationWorker.kt
+++ b/Notifications/Registration/src/main/kotlin/AbstractNotificationsRegistrationWorker.kt
@@ -36,6 +36,8 @@ import createHttpClient
 import io.ktor.client.request.post
 import io.ktor.client.request.setBody
 import io.ktor.client.statement.HttpResponse
+import io.ktor.http.ContentType
+import io.ktor.http.contentType
 import io.ktor.http.isSuccess
 import kotlinx.coroutines.async
 import kotlinx.coroutines.awaitAll
@@ -94,6 +96,7 @@ abstract class AbstractNotificationsRegistrationWorker(
         val httpClient = createHttpClient(okHttpClient)
         return runCatching {
             val response = httpClient.post("$INFOMANIAK_API_V1/devices/register") {
+                contentType(ContentType.Application.Json)
                 setBody(registrationInfo)
             }
             if (response.status.isSuccess()) {