diff --git a/.env.sample b/.env.sample
index 666bb96..25383ae 100644
--- a/.env.sample
+++ b/.env.sample
@@ -9,3 +9,4 @@ LETS_ENCRYPT_ENV=production
 
 SECRET_TEST_PASSWORD_VERSION=v1
 SECRET_TEST_PASSWORD_TWO_VERSION=v1 # length=10
+SECRET_TP3_VERSION=v1 # length=50
diff --git a/compose.yml b/compose.yml
index e14a218..11310ee 100644
--- a/compose.yml
+++ b/compose.yml
@@ -11,6 +11,7 @@ services:
     secrets:
       - test_password
       - test_password_two
+      - tp3
     deploy:
       restart_policy:
         condition: on-failure
@@ -46,6 +47,9 @@ secrets:
   test_password_two:
     external: true
     name: ${STACK_NAME}_test_password_two_${SECRET_TEST_PASSWORD_TWO_VERSION}
+  tp3:
+    external: true
+    name: ${STACK_NAME}_tp3_${SECRET_TP3_VERSION}
 
 volumes:
   test-volume: