diff --git a/docker-compose.yml b/docker-compose.yml
index 7fe4794..a7dc00e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -66,7 +66,7 @@ services:
   # PostgreSQL Database Service
   # --- textsender_api web api db ---
   main_db:
-    image: postgres:18.3-alpine # Use an official Postgres image (Alpine variant is smaller)
+    image: postgres:18.4-alpine # Use an official Postgres image (Alpine variant is smaller)
     container_name: textsender_api_db # Optional: Give the container a specific name
     environment:
       # These MUST match the user, password, and database name in the DATABASE_URL above