diff --git a/app/build.gradle b/app/build.gradle
index e1f07867b0..3577205d5d 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -12,8 +12,8 @@ android {
         applicationId "org.ole.planet.myplanet"
         minSdk = 26
         targetSdk = 36
-        versionCode = 5362
-        versionName = "0.53.62"
+        versionCode = 5363
+        versionName = "0.53.63"
         ndkVersion = '26.3.11579264'
         vectorDrawables.useSupportLibrary = true
     }
diff --git a/app/src/main/java/org/ole/planet/myplanet/services/UploadManager.kt b/app/src/main/java/org/ole/planet/myplanet/services/UploadManager.kt
index 49a0c4ad8d..2175dafac4 100644
--- a/app/src/main/java/org/ole/planet/myplanet/services/UploadManager.kt
+++ b/app/src/main/java/org/ole/planet/myplanet/services/UploadManager.kt
@@ -12,8 +12,13 @@ import java.io.IOException
 import javax.inject.Inject
 import javax.inject.Singleton
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.async
+import kotlinx.coroutines.awaitAll
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.sync.Semaphore
+import kotlinx.coroutines.sync.withPermit
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.RequestBody.Companion.toRequestBody
 import org.ole.planet.myplanet.MainApplication
@@ -456,16 +461,26 @@ class UploadManager @Inject constructor(
             activitiesToUpload.chunked(BATCH_SIZE).forEach { batch ->
                 val successfulUpdates = mutableMapOf<String, com.google.gson.JsonObject?>()
 
-                batch.forEach { activityData ->
-                    try {
-                        val `object` = apiInterface.postDoc(
-                            UrlUtils.header, "application/json",
-                            "${UrlUtils.getUrl()}/login_activities", activityData.serialized
-                        ).body()
-
-                        successfulUpdates[activityData.id] = `object`
-                    } catch (e: java.io.IOException) {
-                        Log.e(TAG, "Exception in UploadManager", e)
+                val semaphore = Semaphore(6)
+                coroutineScope {
+                    val deferreds = batch.map { activityData ->
+                        async {
+                            try {
+                                val `object` = semaphore.withPermit {
+                                    apiInterface.postDoc(
+                                        UrlUtils.header, "application/json",
+                                        "${UrlUtils.getUrl()}/login_activities", activityData.serialized
+                                    ).body()
+                                }
+                                activityData.id to `object`
+                            } catch (e: java.io.IOException) {
+                                Log.e(TAG, "Exception in UploadManager", e)
+                                null
+                            }
+                        }
+                    }
+                    deferreds.awaitAll().filterNotNull().forEach { (id, obj) ->
+                        successfulUpdates[id] = obj
                     }
                 }