diff --git a/src/http/zcl_abapgit_http_client.clas.abap b/src/http/zcl_abapgit_http_client.clas.abap
index 6d3359b76..6e13b0aec 100644
--- a/src/http/zcl_abapgit_http_client.clas.abap
+++ b/src/http/zcl_abapgit_http_client.clas.abap
@@ -71,6 +71,12 @@ CLASS zcl_abapgit_http_client IMPLEMENTATION.
         zcx_abapgit_exception=>raise( 'Unsupported media type (HTTP 415)' ).
       WHEN 422.
         zcx_abapgit_exception=>raise( 'Unprocessable entity (HTTP 422). Check, if URL has to end with ".git"' ).
+      WHEN 426.
+        zcx_abapgit_exception=>raise(
+            iv_text     = 'Upgrade Required (HTTP 426)'
+            iv_longtext = |The git server requires a different HTTP-protocol than which is sent. |
+                       && |abapGit uses HTTP/1.1 as default. |
+                       && |See more details in the abapGit online documentation.| ).
       WHEN OTHERS.
         lv_text = mi_client->response->get_cdata( ).
         zcx_abapgit_exception=>raise( |(HTTP { lv_code }) { lv_text }| ).