diff --git a/requirements.txt b/requirements.txt
index e8ff26f..64e1e5f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,4 +12,5 @@ astropy
 astroquery
 matplotlib
 prefect==3.4.25
-tqdm
\ No newline at end of file
+tqdm
+astropy_healpix