diff --git a/notebooks/ACS/acs_cte_forward_model/requirements.txt b/notebooks/ACS/acs_cte_forward_model/requirements.txt
index 914a4aa95..d2d1df229 100644
--- a/notebooks/ACS/acs_cte_forward_model/requirements.txt
+++ b/notebooks/ACS/acs_cte_forward_model/requirements.txt
@@ -2,7 +2,7 @@ acstools==3.5.0
 astropy==5.2.1
 astroquery==0.4.6
 matplotlib==3.7.0
-numpy==1.23.4
+numpy==1.26.4
 photutils==1.6.0
 crds==11.17.7
 stsci.tools==4.1.0