diff --git a/pgscatalog_utils/__init__.py b/pgscatalog_utils/__init__.py
index 7225152..43a1e95 100644
--- a/pgscatalog_utils/__init__.py
+++ b/pgscatalog_utils/__init__.py
@@ -1 +1 @@
-__version__ = "0.5.2"
+__version__ = "0.5.3"
diff --git a/pgscatalog_utils/validate/schemas.py b/pgscatalog_utils/validate/schemas.py
index 7997b95..cb330d8 100644
--- a/pgscatalog_utils/validate/schemas.py
+++ b/pgscatalog_utils/validate/schemas.py
@@ -50,7 +50,7 @@
 VALID_FILE_EXTENSIONS = [".txt", ".txt.gz"]
 
 # For the harmonized files
-VALID_SOURCES = ['ENSEMBL','Author-reported']
+VALID_SOURCES = ['ENSEMBL','Author-reported','liftover','Unknown']
 # VALID_CODES = ['5','4','3','1','0','-1','-4','-5']
 BUILD_LIST = ['GRCh37','GRCh38']
 
diff --git a/pyproject.toml b/pyproject.toml
index 65ec28d..d7a2ef2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pgscatalog_utils"
-version = "0.5.2"
+version = "0.5.3"
 description = "Utilities for working with PGS Catalog API and scoring files"
 homepage = "https://github.com/PGScatalog/pgscatalog_utils"
 authors = ["Benjamin Wingfield <bwingfield@ebi.ac.uk>", "Samuel Lambert <sl925@medschl.cam.ac.uk>", "Laurent Gil <lg10@sanger.ac.uk>"]