diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..2d9ebdc
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "ivoatex"]
+	path = ivoatex
+	url = https://github.com/ivoa-std/ivoatex.git
diff --git a/Makefile b/Makefile
old mode 100755
new mode 100644
index 37bc31f..a479608
--- a/Makefile
+++ b/Makefile
@@ -4,8 +4,10 @@
 DOCNAME = PulsarRadioDataAccess
 
 # count up; you probably do not want to bother with versions <1.0
+
 DOCVERSION = 1.1
 
+
 # Publication date, ISO format; update manually for "releases"
 DOCDATE = 2022-10-03
 
diff --git a/ivoatex b/ivoatex
index ff71647..4cb591c 160000
--- a/ivoatex
+++ b/ivoatex
@@ -1 +1 @@
-Subproject commit ff71647997f3590bebbc024b9b92434426b5e07d
+Subproject commit 4cb591cb784bd06378b537cff05a02e658aad143