diff --git a/.upptimerc.yml b/.upptimerc.yml
index c2236ceac4..304f040fd1 100644
--- a/.upptimerc.yml
+++ b/.upptimerc.yml
@@ -70,14 +70,18 @@ sites:
         name: ⚗️ EDRN LabCAS authentication endpoint
         url: https://edrn-labcas.jpl.nasa.gov/data-access-api/auth
         headers:
-            - "Authorization: Basic $EDRN_SERVICE_BASIC_AUTH"
+            - "Content-type: application/x-www-form-urlencoded"
+        method: POST
+        body: "username=$EDRN_SERVICE_USERNAME&password=$EDRN_SERVICE_PASSWORD"
         assignees:
             - nutjob4life
     -
         name: ⚗️ MCL LabCAS authentication endpoint
         url: https://mcl-labcas.jpl.nasa.gov/data-access-api/auth
         headers:
-            - "Authorization: Basic $MCL_SERVICE_BASIC_AUTH"
+            - "Content-type: application/x-www-form-urlencoded"
+        method: POST
+        body: "username=$MCL_SERVICE_USERNAME&password=$MCL_SERVICE_PASSWORD"
         assignees:
             - nutjob4life
     -