diff --git a/mx1/containers/stalwart/docker-compose.yml b/mx1/containers/stalwart/docker-compose.yml
index 4890dc8a..a21217a7 100644
--- a/mx1/containers/stalwart/docker-compose.yml
+++ b/mx1/containers/stalwart/docker-compose.yml
@@ -1,7 +1,7 @@
 ---
 services:
   postgres:
-    image: docker.io/library/postgres:16-alpine
+    image: docker.io/library/postgres:18-alpine@sha256:9a8afca54e7861fd90fab5fdf4c42477a6b1cb7d293595148e674e0a3181de15
     restart: unless-stopped
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -d $${POSTGRES_DB} -U $${POSTGRES_USER}"]
diff --git a/web1/containers/authentik/docker-compose.yml b/web1/containers/authentik/docker-compose.yml
index 003b3a2c..8ce6eaa4 100644
--- a/web1/containers/authentik/docker-compose.yml
+++ b/web1/containers/authentik/docker-compose.yml
@@ -1,7 +1,7 @@
 ---
 services:
   database:
-    image: docker.io/library/postgres:16-alpine
+    image: docker.io/library/postgres:18-alpine@sha256:9a8afca54e7861fd90fab5fdf4c42477a6b1cb7d293595148e674e0a3181de15
     restart: unless-stopped
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -d $${POSTGRES_DB} -U $${POSTGRES_USER}"]
diff --git a/web3/containers/authentik/docker-compose.yml b/web3/containers/authentik/docker-compose.yml
index 7fcd81ec..d6bafc6c 100644
--- a/web3/containers/authentik/docker-compose.yml
+++ b/web3/containers/authentik/docker-compose.yml
@@ -1,7 +1,7 @@
 ---
 services:
   database:
-    image: docker.io/library/postgres:16-alpine
+    image: docker.io/library/postgres:18-alpine@sha256:9a8afca54e7861fd90fab5fdf4c42477a6b1cb7d293595148e674e0a3181de15
     restart: unless-stopped
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -d $${POSTGRES_DB} -U $${POSTGRES_USER}"]