diff --git a/src/registrar/templates/emails/submission_confirmation.txt b/src/registrar/templates/emails/submission_confirmation.txt
index 2dd4387a4..740e6f393 100644
--- a/src/registrar/templates/emails/submission_confirmation.txt
+++ b/src/registrar/templates/emails/submission_confirmation.txt
@@ -38,5 +38,5 @@ The .gov team
 Contact us: <https://get.gov/contact/>
 Learn about .gov <https://get.gov>
 
-The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <http://cisa.gov/>
+The .gov registry is a part of the Cybersecurity and Infrastructure Security Agency (CISA) <https://cisa.gov/>
 {% endautoescape %}