diff --git a/VersionNum b/VersionNum
index c0f115468eb025f795bf7d5163d1b9bf525f1e47..2125251ed48906feb6dc34454235492c57b31549 100644
--- a/VersionNum
+++ b/VersionNum
@@ -1,23 +1,23 @@
-/* (2.75)
+/* (2.76)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        2.75
+#define Module_MajorVersion_CMHG        2.76
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                15 Apr 2018
+#define Module_Date_CMHG                27 Apr 2018
 
-#define Module_MajorVersion             "2.75"
-#define Module_Version                  275
+#define Module_MajorVersion             "2.76"
+#define Module_Version                  276
 #define Module_MinorVersion             ""
-#define Module_Date                     "15 Apr 2018"
+#define Module_Date                     "27 Apr 2018"
 
-#define Module_ApplicationDate          "15-Apr-18"
+#define Module_ApplicationDate          "27-Apr-18"
 
 #define Module_ComponentName            "HdrSrc"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Programmer/HdrSrc"
 
-#define Module_FullVersion              "2.75"
-#define Module_HelpVersion              "2.75 (15 Apr 2018)"
-#define Module_LibraryVersionInfo       "2:75"
+#define Module_FullVersion              "2.76"
+#define Module_HelpVersion              "2.76 (27 Apr 2018)"
+#define Module_LibraryVersionInfo       "2:76"
diff --git a/hdr/UpCall b/hdr/UpCall
index a9cc3fe6acbe644ebb76832db1ddc7794ef278ea..96d7161943ac18d5fe6cd77305e83f3b0da07588 100644
--- a/hdr/UpCall
+++ b/hdr/UpCall
@@ -69,6 +69,8 @@ UpCall_PMonitor		# 1	; 22	  ; Acorn
 UpCall_PDumperAction	# 1	; 23	  ; Castle
 UpCall_DriveAdded          # 1   ;24      ; Alert the filer of hot plugging = Castle
 UpCall_DriveRemoved        # 1   ;25      ; drive hardware = Castle
+UpCall_CertificateConfirm  # 1   ;26      ; query certificate chain
+UpCall_CertificateConfirmEnd # 1 ;27      ; query certificate chain finished
 ; MOS UpCalls
                         ^ 256
 UpCall_NewApplication   # 1             ; cf. Service_NewApplication