diff --git a/guh.pri b/guh.pri
index 9ca85cfb..dff7a0dd 100644
--- a/guh.pri
+++ b/guh.pri
@@ -2,7 +2,7 @@
 GUH_VERSION_STRING=$$system('dpkg-parsechangelog | sed -n -e "s/^Version: //p"')
 
 # define JSON protocol version
-JSON_PROTOCOL_VERSION=27
+JSON_PROTOCOL_VERSION=28
 
 DEFINES += GUH_VERSION_STRING=\\\"$${GUH_VERSION_STRING}\\\" JSON_PROTOCOL_VERSION=\\\"$${JSON_PROTOCOL_VERSION}\\\"
 
diff --git a/tests/auto/api.json b/tests/auto/api.json
index 3aecb62f..48037efb 100644
--- a/tests/auto/api.json
+++ b/tests/auto/api.json
@@ -1,4 +1,4 @@
-27
+28
 {
     "methods": {
         "Actions.ExecuteAction": {