diff --git a/.github/workflows/lint-markdown.yml b/.github/workflows/lint-markdown.yml
index 64db6ed..d3068da 100644
--- a/.github/workflows/lint-markdown.yml
+++ b/.github/workflows/lint-markdown.yml
@@ -12,9 +12,9 @@ jobs:
   markdownlint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
-      - uses: DavidAnson/markdownlint-cli2-action@v25
+      - uses: DavidAnson/markdownlint-cli2-action@696eb3f2509270d7b882d2aa68347bc676e7af34 # v25.0.0
         with:
           globs: "**/*.md"
diff --git a/pihole/.env.example b/pihole/.env.example
index c2c1bec..824f82b 100644
--- a/pihole/.env.example
+++ b/pihole/.env.example
@@ -1,3 +1,6 @@
+# Container hostname (shown in the Pi-hole UI)
+PIHOLE_HOSTNAME=pihole
+
 # Local domain to access Pi-hole web UI
 PIHOLE_LOCAL_DOMAIN=pihole.local
 
diff --git a/pihole/README.md b/pihole/README.md
index 1b29c97..9a13811 100644
--- a/pihole/README.md
+++ b/pihole/README.md
@@ -8,6 +8,7 @@ and `SYS_NICE` capabilities for DNS/DHCP operations.
 
 | Variable              | Description                            |
 |-----------------------|----------------------------------------|
+| `PIHOLE_HOSTNAME`     | Container hostname                     |
 | `PIHOLE_WEB_PASSWORD` | Password for the web admin interface   |
 | `PIHOLE_LOCAL_DOMAIN` | Domain to access the web interface     |
 
diff --git a/pihole/docker-compose.yml b/pihole/docker-compose.yml
index cfdc139..ef6d9d3 100644
--- a/pihole/docker-compose.yml
+++ b/pihole/docker-compose.yml
@@ -2,7 +2,7 @@ services:
   pihole:
     image: pihole/pihole:latest
     container_name: pihole
-    hostname: tuckfow-home
+    hostname: ${PIHOLE_HOSTNAME:?PIHOLE_HOSTNAME is required}
     restart: unless-stopped
     cap_add:
       - NET_ADMIN
diff --git a/plex/.env.example b/plex/.env.example
index 1165588..00421e4 100644
--- a/plex/.env.example
+++ b/plex/.env.example
@@ -1,3 +1,6 @@
+# Container hostname (Plex uses it as the default server name)
+PLEX_HOSTNAME=plex
+
 # Plex local IP
 PLEX_LOCAL_IP=x.x.x.x
 
diff --git a/plex/README.md b/plex/README.md
index 3a71572..47f25f0 100644
--- a/plex/README.md
+++ b/plex/README.md
@@ -7,6 +7,7 @@ organizing and streaming movies, TV shows and music.
 
 | Variable            | Description                                        |
 |---------------------|----------------------------------------------------|
+| `PLEX_HOSTNAME`     | Container hostname (default Plex server name)      |
 | `PLEX_MOUNTED_DATA` | Host path where the media folders are mounted      |
 | `PLEX_LOCAL_IP`     | Local IP of the server running Plex                |
 | `PLEX_CLAIM`        | Optional claim token, only for the first setup     |
diff --git a/plex/docker-compose.yml b/plex/docker-compose.yml
index 46c9395..f6f90d3 100644
--- a/plex/docker-compose.yml
+++ b/plex/docker-compose.yml
@@ -2,7 +2,7 @@ services:
   plex:
     image: linuxserver/plex:latest
     container_name: plex
-    hostname: tuckfow-home
+    hostname: ${PLEX_HOSTNAME:?PLEX_HOSTNAME is required}
     restart: unless-stopped
     devices:
       - /dev/dri:/dev/dri