diff --git a/src/ontology/upheno-odk.yaml b/src/ontology/upheno-odk.yaml
index 3a75058a..9eb13fff 100644
--- a/src/ontology/upheno-odk.yaml
+++ b/src/ontology/upheno-odk.yaml
@@ -195,7 +195,7 @@ sources:
       #- ncit
   - id: zp
     mirror_from: http://purl.obolibrary.org/obo/zp/zp-base.owl
-    root: http://purl.obolibrary.org/obo/ZP_00000000
+    root: http://purl.obolibrary.org/obo/ZP_0000000
     prefix_iri: http://purl.obolibrary.org/obo/ZP_
     taxon: http://purl.obolibrary.org/obo/ZP
     taxon_label: ZPO
@@ -279,4 +279,4 @@ import_group:
     - id: cl
     - id: mpath
 documentation:
-  documentation_system: mkdocs
\ No newline at end of file
+  documentation_system: mkdocs
diff --git a/upheno_root_alignments.owl b/upheno_root_alignments.owl
index e2460664..e44dc445 100644
--- a/upheno_root_alignments.owl
+++ b/upheno_root_alignments.owl
@@ -14,7 +14,7 @@ SubClassOf(<http://purl.obolibrary.org/obo/MP_0000001> <http://purl.obolibrary.o
 SubClassOf(<http://purl.obolibrary.org/obo/WBPhenotype_0000886> <http://purl.obolibrary.org/obo/UPHENO_0001001>)
 SubClassOf(<http://purl.obolibrary.org/obo/XPO_00000000> <http://purl.obolibrary.org/obo/UPHENO_0001001>)
 SubClassOf(<http://purl.obolibrary.org/obo/PLANP_00000000> <http://purl.obolibrary.org/obo/UPHENO_0001001>)
-SubClassOf(<http://purl.obolibrary.org/obo/ZP_00000000> <http://purl.obolibrary.org/obo/UPHENO_0001001>)
+SubClassOf(<http://purl.obolibrary.org/obo/ZP_0000000> <http://purl.obolibrary.org/obo/UPHENO_0001001>)
 SubClassOf(<http://purl.obolibrary.org/obo/FBcv_0001347> <http://purl.obolibrary.org/obo/UPHENO_0001001>)
 SubClassOf(<http://purl.obolibrary.org/obo/DDPHENO_0010000> <http://purl.obolibrary.org/obo/UPHENO_0001001>)
 SubClassOf(<http://purl.obolibrary.org/obo/MGPO_0001001> <http://purl.obolibrary.org/obo/UPHENO_0001001>)