diff --git a/app/src/main/kotlin/com/syncflow/data/providers/webdav/WebDavProvider.kt b/app/src/main/kotlin/com/syncflow/data/providers/webdav/WebDavProvider.kt
index 964528a..5d7012c 100644
--- a/app/src/main/kotlin/com/syncflow/data/providers/webdav/WebDavProvider.kt
+++ b/app/src/main/kotlin/com/syncflow/data/providers/webdav/WebDavProvider.kt
@@ -27,7 +27,14 @@ import java.util.concurrent.TimeUnit
 open class WebDavProvider(protected val account: CloudAccount) : CloudProvider {
 
     protected open val baseUrl: String
-        get() = account.serverUrl?.trimEnd('/') ?: ""
+        get() {
+            val raw = account.serverUrl?.trimEnd('/') ?: ""
+            // Silently upgrade http:// → https:// so that phone configs saved with
+            // http:// still work when the server only accepts HTTPS (e.g. behind Traefik
+            // with a global HTTP→HTTPS redirect). WebDAV methods (PROPFIND, MKCOL, MOVE)
+            // are not followed through redirects by OkHttp, so they would silently fail.
+            return if (raw.startsWith("http://")) "https://" + raw.removePrefix("http://") else raw
+        }
 
     protected val client: OkHttpClient by lazy {
         val creds = Json.parseToJsonElement(account.credentialJson).jsonObject
diff --git a/version.properties b/version.properties
index 0892f71..5f634f7 100644
--- a/version.properties
+++ b/version.properties
@@ -1,2 +1,2 @@
-VERSION_NAME=1.0.72
-VERSION_CODE=72
+VERSION_NAME=1.0.73
+VERSION_CODE=73