diff --git a/src/main/kotlin/de/cyface/uploader/DefaultUploader.kt b/src/main/kotlin/de/cyface/uploader/DefaultUploader.kt
index aed9407..a612585 100644
--- a/src/main/kotlin/de/cyface/uploader/DefaultUploader.kt
+++ b/src/main/kotlin/de/cyface/uploader/DefaultUploader.kt
@@ -90,7 +90,7 @@ class DefaultUploader(private val apiEndpoint: String) : Uploader {
         file: File,
         progressListener: UploadProgressListener
     ): Result {
-        val endpoint = filesEndpoint(measurementId)
+        val endpoint = attachmentsEndpoint(measurementId)
         return uploadFile(jwtToken, metaData, file, endpoint, progressListener)
     }
 
@@ -98,8 +98,8 @@ class DefaultUploader(private val apiEndpoint: String) : Uploader {
         return URL(returnUrlWithTrailingSlash(apiEndpoint) + "measurements")
     }
 
-    override fun filesEndpoint(measurementId: Long): URL {
-        return URL(returnUrlWithTrailingSlash(apiEndpoint) + "measurements/$measurementId/files")
+    override fun attachmentsEndpoint(measurementId: Long): URL {
+        return URL(returnUrlWithTrailingSlash(apiEndpoint) + "measurements/$measurementId/attachments")
     }
 
     @Throws(UploadFailed::class)
diff --git a/src/main/kotlin/de/cyface/uploader/Uploader.kt b/src/main/kotlin/de/cyface/uploader/Uploader.kt
index 9bc94bb..addf74c 100644
--- a/src/main/kotlin/de/cyface/uploader/Uploader.kt
+++ b/src/main/kotlin/de/cyface/uploader/Uploader.kt
@@ -88,5 +88,5 @@ interface Uploader {
      * @throws MalformedURLException if the endpoint address is malformed.
      */
     @Throws(MalformedURLException::class)
-    fun filesEndpoint(measurementId: Long): URL
+    fun attachmentsEndpoint(measurementId: Long): URL
 }