diff --git a/src/Symfony/Component/Notifier/Bridge/Nexmo/README.md b/src/Symfony/Component/Notifier/Bridge/Nexmo/README.md
index 091c7c73bd..492e1a4ebd 100644
--- a/src/Symfony/Component/Notifier/Bridge/Nexmo/README.md
+++ b/src/Symfony/Component/Notifier/Bridge/Nexmo/README.md
@@ -3,6 +3,19 @@ Nexmo Notifier
 
 Provides Nexmo integration for Symfony Notifier.
 
+DSN example
+-----------
+
+```
+// .env file
+NEXMO_DSN=nexmo://API_KEY:API_SECRET@default?from=FROM
+```
+
+where:
+ - `API_KEY` is your Nexmo API key
+ - `API_SECRET` is your Nexmo API secret
+ - `FROM` is the sender
+
 Resources
 ---------
 
diff --git a/src/Symfony/Component/Notifier/Bridge/Slack/README.md b/src/Symfony/Component/Notifier/Bridge/Slack/README.md
index 00c66a4c22..2c2d6c8221 100644
--- a/src/Symfony/Component/Notifier/Bridge/Slack/README.md
+++ b/src/Symfony/Component/Notifier/Bridge/Slack/README.md
@@ -3,6 +3,18 @@ Slack Notifier
 
 Provides Slack integration for Symfony Notifier.
 
+DSN example
+-----------
+
+```
+// .env file
+SLACK_DSN=slack://ACCESS_TOKEN@default?channel=CHANNEL
+```
+
+where:
+ - `ACCESS_TOKEN` is your Slack access token
+ - `CHANNEL` is the Slack channel
+
 Resources
 ---------
 
diff --git a/src/Symfony/Component/Notifier/Bridge/Telegram/README.md b/src/Symfony/Component/Notifier/Bridge/Telegram/README.md
index 7f9b6c9c2d..1e9da5dc30 100644
--- a/src/Symfony/Component/Notifier/Bridge/Telegram/README.md
+++ b/src/Symfony/Component/Notifier/Bridge/Telegram/README.md
@@ -3,6 +3,18 @@ Telegram Notifier
 
 Provides Telegram integration for Symfony Notifier.
 
+DSN example
+-----------
+
+```
+// .env file
+TELEGRAM_DSN=telegram://TOKEN@default?channel=CHANNEL
+```
+
+where:
+ - `TOKEN` is your Telegram token
+ - `CHANNEL` is the Slack channel
+
 Resources
 ---------
 
diff --git a/src/Symfony/Component/Notifier/Bridge/Twilio/README.md b/src/Symfony/Component/Notifier/Bridge/Twilio/README.md
index d86bef51b9..5373293458 100644
--- a/src/Symfony/Component/Notifier/Bridge/Twilio/README.md
+++ b/src/Symfony/Component/Notifier/Bridge/Twilio/README.md
@@ -3,6 +3,19 @@ Twilio Notifier
 
 Provides Twilio integration for Symfony Notifier.
 
+DSN example
+-----------
+
+```
+// .env file
+TWILIO_DSN=twilio://ACCOUNT_SID:AUTH_TOKEN@default?from=FROM
+```
+
+where:
+ - `ACCOUNT_SID` is your Twilio account SID
+ - `AUTH_TOKEN` is your Twilio auth token
+ - `FROM` is the sender
+
 Resources
 ---------