diff --git a/manifest.yaml b/manifest.yaml
index 19310dd..78b5f9d 100644
--- a/manifest.yaml
+++ b/manifest.yaml
@@ -1,4 +1,4 @@
-dublin_core:
+dublin_core:
   conformsto: 'rc0.2'
   contributor:
     - 'Antoney Raj'
@@ -24,12 +24,13 @@
     direction: 'ltr'
     identifier: 'bn'
     title: বাংলা
-  modified: '2018-05-10'
+  modified: '2021-09-21'
   publisher: 'BCS'
   relation:
     - 'bn/tn'
     - 'bn/tq'
     - 'bn/tw'
+    - 'bn/obs'
   rights: 'CC BY-SA 4.0'
   source:
     -
@@ -52,63 +53,63 @@ projects:
     title: 'আদিপুস্তক '
     versification: 'ufw'
     identifier: 'gen'
-    sort: 01
+    sort: 1
     path: './01-GEN.usfm'
     categories: [ 'bible-ot' ]
   -
     title: 'যাত্রাপুস্তক '
     versification: 'ufw'
     identifier: 'exo'
-    sort: 02
+    sort: 2
     path: './02-EXO.usfm'
     categories: [ 'bible-ot' ]
   -
     title: 'লেবীয় বই। '
     versification: 'ufw'
     identifier: 'lev'
-    sort: 03
+    sort: 3
     path: './03-LEV.usfm'
     categories: [ 'bible-ot' ]
   -
     title: 'গণনার বই। '
     versification: ufw
     identifier: num
-    sort: 04
+    sort: 4
     path: ./04-NUM.usfm
     categories: [ 'bible-ot' ]
   -
     title: 'দ্বিতীয় বিবরণ '
     versification: 'ufw'
     identifier: 'deu'
-    sort: 05
+    sort: 5
     path: './05-DEU.usfm'
     categories: [ 'bible-ot' ]
   -
     title: 'যিহোশূয়ের বই '
     versification: 'ufw'
     identifier: 'jos'
-    sort: 06
+    sort: 6
     path: './06-JOS.usfm'
     categories: [ 'bible-ot' ]
   -
     title: 'বিচারকর্ত্তৃগণের বিবরণ '
     versification: 'ufw'
     identifier: 'jdg'
-    sort: 07
+    sort: 7
     path: './07-JDG.usfm'
     categories: [ 'bible-ot' ]
   -
     title: 'রূতের বিবরণ '
     versification: 'ufw'
     identifier: 'rut'
-    sort: 08
+    sort: 8
     path: './08-RUT.usfm'
     categories: [ 'bible-ot' ]
   -
     title: 'শমূয়েলের প্রথম বই '
     versification: 'ufw'
     identifier: '1sa'
-    sort: 09
+    sort: 9
     path: './09-1SA.usfm'
     categories: [ 'bible-ot' ]
   -