diff --git a/caom2utils/caom2utils/data_util.py b/caom2utils/caom2utils/data_util.py
index 1bdd8801..264d15c1 100644
--- a/caom2utils/caom2utils/data_util.py
+++ b/caom2utils/caom2utils/data_util.py
@@ -359,7 +359,7 @@ def get_local_headers_from_fits(fqn):
     :param fqn str  fully-qualified name of the FITS file on disk
     :return list of fits.Header instances
     """
-    hdulist = fits.open(fqn, memmap=True, lazy_load_hdus=False)
+    hdulist = fits.open(fqn, memmap=True, lazy_load_hdus=True)
     hdulist.verify('fix')
     hdulist.close()
     headers = [h.header for h in hdulist]
diff --git a/caom2utils/setup.cfg b/caom2utils/setup.cfg
index d2647ae0..3f3d60f3 100644
--- a/caom2utils/setup.cfg
+++ b/caom2utils/setup.cfg
@@ -34,7 +34,7 @@ edit_on_github = False
 github_project = opencadc/caom2tools
 install_requires = cadcdata==2.0rc2 caom2>=2.4 astropy>=2.0 spherical-geometry>=1.2.11;python_version>="3.6" vos>=3.1.1
 # version should be PEP386 compatible (http://www.python.org/dev/peps/pep-0386)
-version = 1.6.2
+version = 1.6.3