diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2f141532..02fa1991 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@ Please read about the future of the Firebase Admin PHP SDK on the
 
 ## [Unreleased]
 
+### Added
+
+* Added support for [rollout parameter values](https://firebase.google.com/docs/reference/remote-config/rest/v1/RemoteConfig#RolloutValue)
+  in Remote Config Templates. 
+  ([#923](https://github.com/kreait/firebase-php/pull/923))
+
 ## [7.14.0] - 2024-08-21
 
 ### Added
diff --git a/src/Firebase/RemoteConfig/ParameterValue.php b/src/Firebase/RemoteConfig/ParameterValue.php
index b6b3d093..cd302f1e 100644
--- a/src/Firebase/RemoteConfig/ParameterValue.php
+++ b/src/Firebase/RemoteConfig/ParameterValue.php
@@ -10,12 +10,16 @@
 
 /**
  * @phpstan-import-type RemoteConfigPersonalizationValueShape from PersonalizationValue
+ * @phpstan-import-type RemoteConfigRolloutValueShape from RolloutValue
  *
  * @phpstan-type RemoteConfigParameterValueShape array{
  *     value?: string,
  *     useInAppDefault?: bool,
- *     personalizationValue?: RemoteConfigPersonalizationValueShape
+ *     personalizationValue?: RemoteConfigPersonalizationValueShape,
+ *     rolloutValue?: RemoteConfigRolloutValueShape
  * }
+ *
+ * @see https://firebase.google.com/docs/reference/remote-config/rest/v1/RemoteConfig#remoteconfigparametervalue
  */
 final class ParameterValue implements JsonSerializable
 {
@@ -23,6 +27,7 @@ private function __construct(
         private readonly ?string $value = null,
         private readonly ?bool $useInAppDefault = null,
         private readonly ?PersonalizationValue $personalizationValue = null,
+        private readonly ?RolloutValue $rolloutValue = null,
     ) {
     }
 
@@ -41,6 +46,11 @@ public static function withPersonalizationValue(PersonalizationValue $value): se
         return new self(personalizationValue: $value);
     }
 
+    public static function withRolloutValue(RolloutValue $value): self
+    {
+        return new self(rolloutValue: $value);
+    }
+
     /**
      * @param RemoteConfigParameterValueShape $data
      */
@@ -58,6 +68,10 @@ public static function fromArray(array $data): self
             return self::withPersonalizationValue(PersonalizationValue::fromArray($data['personalizationValue']));
         }
 
+        if (array_key_exists('rolloutValue', $data)) {
+            return self::withRolloutValue(RolloutValue::fromArray($data['rolloutValue']));
+        }
+
         return new self();
     }
 
@@ -78,6 +92,10 @@ public function toArray(): array
             return ['personalizationValue' => $this->personalizationValue->toArray()];
         }
 
+        if ($this->rolloutValue !== null) {
+            return ['rolloutValue' => $this->rolloutValue->toArray()];
+        }
+
         return [];
     }
 
diff --git a/src/Firebase/RemoteConfig/PersonalizationValue.php b/src/Firebase/RemoteConfig/PersonalizationValue.php
index 14175998..5d37903e 100644
--- a/src/Firebase/RemoteConfig/PersonalizationValue.php
+++ b/src/Firebase/RemoteConfig/PersonalizationValue.php
@@ -10,6 +10,8 @@
  * @phpstan-type RemoteConfigPersonalizationValueShape array{
  *    personalizationId: string
  * }
+ *
+ * @see https://firebase.google.com/docs/reference/remote-config/rest/v1/RemoteConfig#personalizationvalue
  */
 final class PersonalizationValue implements JsonSerializable
 {
diff --git a/src/Firebase/RemoteConfig/RolloutValue.php b/src/Firebase/RemoteConfig/RolloutValue.php
new file mode 100644
index 00000000..7173c70f
--- /dev/null
+++ b/src/Firebase/RemoteConfig/RolloutValue.php
@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kreait\Firebase\RemoteConfig;
+
+use JsonSerializable;
+
+/**
+ * @phpstan-type RemoteConfigRolloutValueShape array{
+ *     rolloutId: non-empty-string,
+ *     value: string,
+ *     percent: int<0, 100>
+ * }
+ *
+ * @see https://firebase.google.com/docs/reference/remote-config/rest/v1/RemoteConfig#rolloutvalue
+ */
+final class RolloutValue implements JsonSerializable
+{
+    /**
+     * @param RemoteConfigRolloutValueShape $data
+     */
+    private function __construct(private readonly array $data)
+    {
+    }
+
+    /**
+     * @param RemoteConfigRolloutValueShape $data
+     */
+    public static function fromArray(array $data): self
+    {
+        return new self($data);
+    }
+
+    /**
+     * @return RemoteConfigRolloutValueShape
+     */
+    public function toArray(): array
+    {
+        return $this->data;
+    }
+
+    /**
+     * @return RemoteConfigRolloutValueShape
+     */
+    public function jsonSerialize(): array
+    {
+        return $this->data;
+    }
+}
diff --git a/tests/Integration/RemoteConfigTest.php b/tests/Integration/RemoteConfigTest.php
index 71a6eba6..03e82294 100644
--- a/tests/Integration/RemoteConfigTest.php
+++ b/tests/Integration/RemoteConfigTest.php
@@ -41,6 +41,11 @@ final class RemoteConfigTest extends IntegrationTestCase
                     "name": "lang_french",
                     "expression": "device.language in ['fr', 'fr_CA', 'fr_CH']",
                     "tagColor": "GREEN"
+                },
+                {
+                    "name": "user_exists",
+                    "expression": "true",
+                    "tagColor": "TEAL"
                 }
             ],
             "parameters": {
@@ -63,7 +68,7 @@ final class RemoteConfigTest extends IntegrationTestCase
                 },
                 "unspecified_value_type": {
                     "defaultValue": "1",
-                    "valueType": "STRING"
+                    "valueType": "PARAMETER_VALUE_TYPE_UNSPECIFIED"
                 },
                 "string_value_type": {
                     "defaultValue": "1",
@@ -80,6 +85,20 @@ final class RemoteConfigTest extends IntegrationTestCase
                 "json_value_type": {
                     "defaultValue": "{\"key\": \"value\"}",
                     "valueType": "JSON"
+                },
+                "is_ready_for_rollout": {
+                    "defaultValue": "false",
+                    "valueType": "BOOLEAN",
+                    "conditionalValues": {
+                        "lang_german": {
+                            "value": "false"
+                        },
+                        "user_exists": {
+                            "rollout_id": "rollout_2",
+                            "value": "true",
+                            "percent": 50
+                        }
+                    }
                 }
             },
             "parameterGroups": {