diff --git a/lib/configure.py b/lib/configure.py
index de88d65ae3..659f29070f 100644
--- a/lib/configure.py
+++ b/lib/configure.py
@@ -702,6 +702,7 @@ def checkFormatEntries(dtl_tools):
 \Format lyx16x     16.lyx "LyX 1.6.x"             "" ""	""	"document"	""
 \Format lyx20x     20.lyx "LyX 2.0.x"             "" ""	""	"document"	""
 \Format lyx21x     21.lyx "LyX 2.1.x"             "" ""	""	"document,menu=export"	""
+\Format lyx23x     23.lyx "LyX 2.3.x"             "" ""	""	"document,menu=export"	""
 \Format clyx       cjklyx "CJK LyX 1.4.x (big5)"  "" ""	""	"document"	""
 \Format jlyx       cjklyx "CJK LyX 1.4.x (euc-jp)" "" ""	""	"document"	""
 \Format klyx       cjklyx "CJK LyX 1.4.x (euc-kr)" "" ""	""	"document"	""
@@ -1106,6 +1107,7 @@ def checkConverterEntries():
 \converter lyx        lyx16x     "python -tt $$s/lyx2lyx/lyx2lyx -V 1.6 -o $$o $$i"	""
 \converter lyx        lyx20x     "python -tt $$s/lyx2lyx/lyx2lyx -V 2.0 -o $$o $$i"	""
 \converter lyx        lyx21x     "python -tt $$s/lyx2lyx/lyx2lyx -V 2.1 -o $$o $$i"	""
+\converter lyx        lyx23x     "python -tt $$s/lyx2lyx/lyx2lyx -V 2.3 -o $$o $$i"	""
 \converter lyx        clyx       "python -tt $$s/lyx2lyx/lyx2lyx -V 1.4 -o $$o -c big5   $$i"	""
 \converter lyx        jlyx       "python -tt $$s/lyx2lyx/lyx2lyx -V 1.4 -o $$o -c euc_jp $$i"	""
 \converter lyx        klyx       "python -tt $$s/lyx2lyx/lyx2lyx -V 1.4 -o $$o -c euc_kr $$i"	""