diff --git a/README.md b/README.md
index 7a2c351..fe7aa92 100644
--- a/README.md
+++ b/README.md
@@ -397,6 +397,7 @@ A collection of delicious docker recipes.
 - [x] outlinewiki/outline
 - [x] gabekangas/owncast
 - [x] owncloud
+- [x] dpage/pgadmin4
 - [x] phpmyadmin
 - [x] pihole/pihole
 - [x] mcr.microsoft.com/playwright
diff --git a/nifi/README.md b/nifi/README.md
index 9882da3..68ae52a 100644
--- a/nifi/README.md
+++ b/nifi/README.md
@@ -32,6 +32,9 @@ $ curl http://127.0.0.1:8080/nifi/
 $ curl http://127.0.0.1:18080/nifi-registry/
 ```
 
-> I copied config files from a temporary container. Maybe there are better ways.
+Maybe there are better ways to populate a volume:
+
+- named volumes
+- anonymous volumes
 
 [1]: https://nifi.apache.org
diff --git a/nifi/docker-compose-cluster.yml b/nifi/docker-compose-cluster.yml
index 96d3450..6dc5fcd 100644
--- a/nifi/docker-compose-cluster.yml
+++ b/nifi/docker-compose-cluster.yml
@@ -1,7 +1,7 @@
 version: "3.8"
 services:
   nifi:
-    image: apache/nifi:1.15.1
+    image: apache/nifi:1.15.3
     ports:
       - "8080:8080"
       - "8082:8082"
diff --git a/nifi/docker-compose.yml b/nifi/docker-compose.yml
index f4fd094..7ab5755 100644
--- a/nifi/docker-compose.yml
+++ b/nifi/docker-compose.yml
@@ -3,7 +3,7 @@ version: "3.8"
 services:
 
   nifi:
-    image: apache/nifi:1.15.1
+    image: apache/nifi:1.15.3
     ports:
       - "8080:8080"
     volumes:
@@ -17,14 +17,15 @@ services:
       - ./data/nifi/logs:/opt/nifi/nifi-current/logs
     environment:
       - NIFI_WEB_HTTP_PORT=8080
-      - NIFI_SENSITIVE_PROPS_KEY=00000000-0000-0000-0000-000000000000
       - NIFI_JVM_HEAP_INIT=8g
       - NIFI_JVM_HEAP_MAX=16g
+      - SINGLE_USER_CREDENTIALS_USERNAME=admin
+      - SINGLE_USER_CREDENTIALS_PASSWORD=admin
     hostname: nifi
     restart: unless-stopped
 
   registry:
-    image: apache/nifi-registry:1.15.1
+    image: apache/nifi-registry:1.15.3
     ports:
       - "18080:18080"
     volumes:
diff --git a/pgadmin4/README.md b/pgadmin4/README.md
new file mode 100644
index 0000000..5cedfeb
--- /dev/null
+++ b/pgadmin4/README.md
@@ -0,0 +1,2 @@
+pgadmin4
+========
diff --git a/pgadmin4/docker-compose.yml b/pgadmin4/docker-compose.yml
new file mode 100644
index 0000000..55924c6
--- /dev/null
+++ b/pgadmin4/docker-compose.yml
@@ -0,0 +1,16 @@
+version: "3.8"
+
+services:
+  pgadmin4:
+    image: dpage/pgadmin4
+    ports:
+      - "5050:80"
+    volumes:
+      - data:/var/lib/pgadmin
+    environment:
+      - PGADMIN_DEFAULT_EMAIL=admin@gmail.com
+      - PGADMIN_DEFAULT_PASSWORD=******
+    restart: unless-stopped
+
+volumes:
+  data:
diff --git a/pgadmin4/nginx.conf b/pgadmin4/nginx.conf
new file mode 100644
index 0000000..6d8c108
--- /dev/null
+++ b/pgadmin4/nginx.conf
@@ -0,0 +1,30 @@
+#
+# https://www.pgadmin.org/docs/pgadmin4/latest/container_deployment.html
+#
+
+server {
+    listen 80;
+    return 301 https://$host$request_uri;
+}
+
+server {
+    listen 443;
+    server_name _;
+
+    ssl_certificate /etc/nginx/server.cert;
+    ssl_certificate_key /etc/nginx/server.key;
+
+    ssl on;
+    ssl_session_cache builtin:1000 shared:SSL:10m;
+    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
+    ssl_ciphers HIGH:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4;
+    ssl_prefer_server_ciphers on;
+
+    location / {
+        proxy_set_header X-Script-Name /;
+        proxy_set_header X-Scheme $scheme;
+        proxy_set_header Host $host;
+        proxy_pass http://localhost:5050/;
+        proxy_redirect off;
+    }
+}