diff --git a/CloudCommonProtos/composer.json b/CloudCommonProtos/composer.json
index 0361dacbc9a4..a20b2e2b0ab1 100644
--- a/CloudCommonProtos/composer.json
+++ b/CloudCommonProtos/composer.json
@@ -8,7 +8,7 @@
   "homepage": "https://github.com/googleapis/google-cloud-php-common-protos",
   "license": "Apache-2.0",
   "require": {
-    "google/protobuf": "^4.31",
+    "google/protobuf": "^5.0",
     "google/common-protos": "^3.0||^4.0"
   },
   "require-dev": {
diff --git a/CommonProtos/composer.json b/CommonProtos/composer.json
index a69cf2598d3d..8509a5113082 100644
--- a/CommonProtos/composer.json
+++ b/CommonProtos/composer.json
@@ -10,7 +10,7 @@
   "license": "Apache-2.0",
   "require": {
     "php": "^8.1",
-    "google/protobuf": "^4.31"
+    "google/protobuf": "^5.0"
   },
   "require-dev": {
     "phpunit/phpunit": "^9.6"
diff --git a/GeoCommonProtos/composer.json b/GeoCommonProtos/composer.json
index 297c6fc07030..3f10715f18a8 100644
--- a/GeoCommonProtos/composer.json
+++ b/GeoCommonProtos/composer.json
@@ -18,7 +18,7 @@
     },
     "require": {
         "php": "^8.1",
-        "google/protobuf": "^4.31",
+        "google/protobuf": "^5.0",
         "google/common-protos": "^4.6"
     },
     "require-dev": {
diff --git a/ShoppingCommonProtos/composer.json b/ShoppingCommonProtos/composer.json
index 06f3c2019d23..a556b1b0a89a 100644
--- a/ShoppingCommonProtos/composer.json
+++ b/ShoppingCommonProtos/composer.json
@@ -18,7 +18,7 @@
     },
     "require": {
         "php": "^8.1",
-        "google/protobuf": "^4.31"
+        "google/protobuf": "^5.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.0"