diff --git a/vitals/biomarkers/helpers.py b/vitals/biomarkers/helpers.py
index 7029503..6c0fd9c 100755
--- a/vitals/biomarkers/helpers.py
+++ b/vitals/biomarkers/helpers.py
@@ -1,8 +1,9 @@
 from typing import TypeVar
 
-import schemas
 from pydantic import BaseModel
 
+from vitals.biomarkers import schemas
+
 Biomarkers = TypeVar("Biomarkers", bound=BaseModel)
 Units = schemas.PhenoageUnits | schemas.Score2Units
 
diff --git a/vitals/biomarkers/io.py b/vitals/biomarkers/io.py
index f9ed937..8858e1b 100755
--- a/vitals/biomarkers/io.py
+++ b/vitals/biomarkers/io.py
@@ -1,7 +1,7 @@
 import json
 from pathlib import Path
 
-import helpers
+from vitals.biomarkers import helpers
 
 
 def update(input_file: Path) -> dict:
diff --git a/vitals/phenoage/compute.py b/vitals/phenoage/compute.py
index eb404ad..5397876 100755
--- a/vitals/phenoage/compute.py
+++ b/vitals/phenoage/compute.py
@@ -1,7 +1,8 @@
 import numpy as np
-from biomarkers import helpers, schemas
 from pydantic import BaseModel
 
+from vitals.biomarkers import helpers, schemas
+
 
 class LinearModel(BaseModel):
     """
diff --git a/vitals/score2/compute.py b/vitals/score2/compute.py
index 457e08d..107d227 100644
--- a/vitals/score2/compute.py
+++ b/vitals/score2/compute.py
@@ -6,9 +6,10 @@
 """
 
 import numpy as np
-from biomarkers import helpers, schemas
 from pydantic import BaseModel
 
+from vitals.biomarkers import helpers, schemas
+
 
 class ModelCoefficients(BaseModel):
     """