diff --git a/requirements.txt b/requirements.txt
index 0b5a9df1f..dbe0a2054 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 asdf==2.6.0
-astropy==4.0.1
+astropy==4.0.1.post1
 astroquery==0.4
 authlib==0.14.1
 bokeh==1.3.4