diff --git a/requirements.txt b/requirements.txt
index fc0cf3c2cfe1dd1964a12c2f4420c03e24fa3350..a80e7f85a2fd7227cd4cf9a220b78de224b05e96 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,6 @@ scipy==1.9.2
 setuptools==65.5.1
 pandas==1.2.3
 julian==0.14
-astropy=5.1
-tqdm=4.59.0
-galsim=2.4.5
+astropy==5.1
+tqdm==4.59.0
+galsim==2.4.5