diff --git a/src/ontology/Makefile b/src/ontology/Makefile
index c1d5f52..68dc3a1 100644
--- a/src/ontology/Makefile
+++ b/src/ontology/Makefile
@@ -1,13 +1,14 @@
 ONT=bspo
 OBO=http://purl.obolibrary.org/obo
 DATE=$(shell date +'%Y-%m-%d')
+OBODATE=$(shell date +'%d:%m:%Y %H:%M')
 PREFIX=$(OBO)/$(ONT)
 RELEASEPREFIX=$(PREFIX)/releases/$(DATE)
 
 all: bspo.owl bspo.obo bspo-base.owl
 
 bspo-base.owl: bspo-edit.obo
-	robot annotate -i $< --ontology-iri $(PREFIX)/$(ONT)-base.owl --version-iri $(RELEASEPREFIX)/$(ONT)-base.owl -o $@
+	robot annotate -i $< --ontology-iri $(PREFIX)/$(ONT)-base.owl --version-iri $(RELEASEPREFIX)/$(ONT)-base.owl --annotation oboInOwl:date "$(OBODATE)" -o $@
 
 bspo.owl: bspo-base.owl
 	robot reason -i $< --reasoner hermit annotate --ontology-iri $(PREFIX).owl --version-iri $(RELEASEPREFIX)/$(ONT).owl -o $@
diff --git a/src/ontology/bspo-edit.obo b/src/ontology/bspo-edit.obo
index 1f7aa8d..8e05953 100644
--- a/src/ontology/bspo-edit.obo
+++ b/src/ontology/bspo-edit.obo
@@ -1,7 +1,4 @@
 format-version: 1.2
-date: 22:01:2014 15:38
-saved-by: wasila.dahdul
-auto-generated-by: OBO-Edit 2.3-beta5
 synonymtypedef: human "synonym typically used in the context of human anatomy" NARROW
 synonymtypedef: vertebrate "synonym typically used in the context of vertebrate anatomy" NARROW
 default-namespace: spatial