diff --git a/composer.json b/composer.json
index 4f81d054cd008..b9c5141c191a2 100644
--- a/composer.json
+++ b/composer.json
@@ -207,7 +207,7 @@
             "url": "src/Symfony/Contracts",
             "options": {
                 "versions": {
-                    "symfony/contracts": "3.3.x-dev"
+                    "symfony/contracts": "3.4.x-dev"
                 }
             }
         },
diff --git a/src/Symfony/Contracts/Cache/composer.json b/src/Symfony/Contracts/Cache/composer.json
index 79a1d2dd1416e..f80d0b5595b01 100644
--- a/src/Symfony/Contracts/Cache/composer.json
+++ b/src/Symfony/Contracts/Cache/composer.json
@@ -25,7 +25,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-main": "3.3-dev"
+            "dev-main": "3.4-dev"
         },
         "thanks": {
             "name": "symfony/contracts",
diff --git a/src/Symfony/Contracts/Deprecation/composer.json b/src/Symfony/Contracts/Deprecation/composer.json
index 774200fdcdae8..c6d02d874966f 100644
--- a/src/Symfony/Contracts/Deprecation/composer.json
+++ b/src/Symfony/Contracts/Deprecation/composer.json
@@ -25,7 +25,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-main": "3.3-dev"
+            "dev-main": "3.4-dev"
         },
         "thanks": {
             "name": "symfony/contracts",
diff --git a/src/Symfony/Contracts/EventDispatcher/composer.json b/src/Symfony/Contracts/EventDispatcher/composer.json
index 4b6a136add482..3618d53e973b1 100644
--- a/src/Symfony/Contracts/EventDispatcher/composer.json
+++ b/src/Symfony/Contracts/EventDispatcher/composer.json
@@ -25,7 +25,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-main": "3.3-dev"
+            "dev-main": "3.4-dev"
         },
         "thanks": {
             "name": "symfony/contracts",
diff --git a/src/Symfony/Contracts/HttpClient/composer.json b/src/Symfony/Contracts/HttpClient/composer.json
index 0c2102fd3cff6..084d49072a21d 100644
--- a/src/Symfony/Contracts/HttpClient/composer.json
+++ b/src/Symfony/Contracts/HttpClient/composer.json
@@ -27,7 +27,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-main": "3.3-dev"
+            "dev-main": "3.4-dev"
         },
         "thanks": {
             "name": "symfony/contracts",
diff --git a/src/Symfony/Contracts/Service/composer.json b/src/Symfony/Contracts/Service/composer.json
index a2530e9aa9095..a64188b51bf98 100644
--- a/src/Symfony/Contracts/Service/composer.json
+++ b/src/Symfony/Contracts/Service/composer.json
@@ -31,7 +31,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-main": "3.3-dev"
+            "dev-main": "3.4-dev"
         },
         "thanks": {
             "name": "symfony/contracts",
diff --git a/src/Symfony/Contracts/Translation/composer.json b/src/Symfony/Contracts/Translation/composer.json
index 49e6dc7ffc919..213b5cda8b269 100644
--- a/src/Symfony/Contracts/Translation/composer.json
+++ b/src/Symfony/Contracts/Translation/composer.json
@@ -27,7 +27,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-main": "3.3-dev"
+            "dev-main": "3.4-dev"
         },
         "thanks": {
             "name": "symfony/contracts",
diff --git a/src/Symfony/Contracts/composer.json b/src/Symfony/Contracts/composer.json
index a165e44844c71..b04b9e6401d94 100644
--- a/src/Symfony/Contracts/composer.json
+++ b/src/Symfony/Contracts/composer.json
@@ -45,7 +45,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-main": "3.3-dev"
+            "dev-main": "3.4-dev"
         }
     }
 }