diff --git a/requirements.txt b/requirements.txt
index 483fce7..171a90c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ astroplan>=0.8, <=0.10
 astropy>=5.2.0.a, <6.1
 astroquery==0.4.*
 ipyaladin>=0.2.2
-MOCpy >=0.13.*, < 0.14.0
+MOCpy >= 0.13.0.a, < 0.15.0
 pandas >= 2.0.3, < 2.3.0
 plotly>=5.14.0.a, <=5.22.0
 pyvo>=1.4.1, <=1.5.2