diff --git a/src/Symfony/Bundle/FrameworkBundle/composer.json b/src/Symfony/Bundle/FrameworkBundle/composer.json
index 2b4a2716b4e3b..107ef385a23d6 100644
--- a/src/Symfony/Bundle/FrameworkBundle/composer.json
+++ b/src/Symfony/Bundle/FrameworkBundle/composer.json
@@ -51,7 +51,7 @@
         "symfony/security-http": "^4.4|^5.0",
         "symfony/serializer": "^4.4|^5.0",
         "symfony/stopwatch": "^4.4|^5.0",
-        "symfony/string": "^5.0",
+        "symfony/string": "~5.0.0",
         "symfony/translation": "^5.0",
         "symfony/twig-bundle": "^4.4|^5.0",
         "symfony/validator": "^4.4|^5.0",
@@ -79,8 +79,10 @@
         "symfony/mailer": "<4.4",
         "symfony/messenger": "<4.4",
         "symfony/mime": "<4.4",
+        "symfony/notifier": ">=5.1",
         "symfony/property-info": "<4.4",
         "symfony/serializer": "<4.4",
+        "symfony/string": ">=5.1",
         "symfony/stopwatch": "<4.4",
         "symfony/translation": "<5.0",
         "symfony/twig-bridge": "<4.4",
diff --git a/src/Symfony/Component/Notifier/Bridge/Nexmo/composer.json b/src/Symfony/Component/Notifier/Bridge/Nexmo/composer.json
index 1356691a3b910..2cf949c76d096 100644
--- a/src/Symfony/Component/Notifier/Bridge/Nexmo/composer.json
+++ b/src/Symfony/Component/Notifier/Bridge/Nexmo/composer.json
@@ -18,7 +18,7 @@
     "require": {
         "php": "^7.2.9",
         "symfony/http-client": "^4.3|^5.0",
-        "symfony/notifier": "^5.0"
+        "symfony/notifier": "~5.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Notifier\\Bridge\\Twilio\\": "" },
diff --git a/src/Symfony/Component/Notifier/Bridge/Slack/composer.json b/src/Symfony/Component/Notifier/Bridge/Slack/composer.json
index 0c60259d1e772..9f541c0c899bd 100644
--- a/src/Symfony/Component/Notifier/Bridge/Slack/composer.json
+++ b/src/Symfony/Component/Notifier/Bridge/Slack/composer.json
@@ -18,7 +18,7 @@
     "require": {
         "php": "^7.2.9",
         "symfony/http-client": "^4.3|^5.0",
-        "symfony/notifier": "^5.0"
+        "symfony/notifier": "~5.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Notifier\\Bridge\\Slack\\": "" },
diff --git a/src/Symfony/Component/Notifier/Bridge/Telegram/composer.json b/src/Symfony/Component/Notifier/Bridge/Telegram/composer.json
index b04f3d28182a2..d041b3f045f4a 100644
--- a/src/Symfony/Component/Notifier/Bridge/Telegram/composer.json
+++ b/src/Symfony/Component/Notifier/Bridge/Telegram/composer.json
@@ -18,7 +18,7 @@
     "require": {
         "php": "^7.2.9",
         "symfony/http-client": "^4.3|^5.0",
-        "symfony/notifier": "^5.0"
+        "symfony/notifier": "~5.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Notifier\\Bridge\\Telegram\\": "" },
diff --git a/src/Symfony/Component/Notifier/Bridge/Twilio/composer.json b/src/Symfony/Component/Notifier/Bridge/Twilio/composer.json
index 9eed152551b28..e23483a28e16b 100644
--- a/src/Symfony/Component/Notifier/Bridge/Twilio/composer.json
+++ b/src/Symfony/Component/Notifier/Bridge/Twilio/composer.json
@@ -18,7 +18,7 @@
     "require": {
         "php": "^7.2.9",
         "symfony/http-client": "^4.3|^5.0",
-        "symfony/notifier": "^5.0"
+        "symfony/notifier": "~5.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Notifier\\Bridge\\Twilio\\": "" },