diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7c12fc6..2fe6b06 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+# v8.2.0 (2024-08-05)
+
+> [!NOTE] Minimum supported Laravel version is bumped to 11.15.0 for #224.
+
+- Fixed an issue where Schema changes were applied twice. (#224)
+
 # v8.1.3 (2024-06-24)
 
 Fixed
diff --git a/composer.json b/composer.json
index c9d3327..86dbed7 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
     "php": "^8.2",
     "ext-grpc": "*",
     "ext-json": "*",
-    "laravel/framework": "^11",
+    "laravel/framework": "^11.15.0",
     "google/cloud-spanner": "^1.58.4",
     "grpc/grpc": "^1.42",
     "symfony/cache": "~7",
diff --git a/src/Eloquent/Model.php b/src/Eloquent/Model.php
index 797be74..9d36deb 100644
--- a/src/Eloquent/Model.php
+++ b/src/Eloquent/Model.php
@@ -24,7 +24,7 @@
 use Illuminate\Support\Str;
 
 /**
- * @mixin Builder
+ * @mixin Builder<static>
  */
 class Model extends BaseModel
 {
@@ -42,7 +42,7 @@ class Model extends BaseModel
     public $incrementing = false;
 
     /**
-     * @param BaseModel|Relation $query
+     * @param BaseModel|Relation<BaseModel, $this, BaseModel> $query
      * @param mixed $value
      * @param string|null $field
      * @return BuilderContract
@@ -59,7 +59,7 @@ public function resolveRouteBindingQuery($query, $value, $field = null)
      * @param  string  $childType
      * @param  mixed  $value
      * @param  string|null  $field
-     * @return Relation
+     * @return Relation<BaseModel, $this, *>
      */
     protected function resolveChildRouteBindingQuery($childType, $value, $field)
     {
diff --git a/src/Schema/Grammar.php b/src/Schema/Grammar.php
index 6164901..3a40799 100644
--- a/src/Schema/Grammar.php
+++ b/src/Schema/Grammar.php
@@ -115,14 +115,19 @@ public function compileCreate(Blueprint $blueprint, Fluent $command)
      *
      * @param  Blueprint  $blueprint
      * @param  Fluent<string, mixed> $command
-     * @return string[]
+     * @return list<string>|string
      */
     public function compileAdd(Blueprint $blueprint, Fluent $command)
     {
-        return $this->prefixArray(
-            'alter table '.$this->wrapTable($blueprint).' add column',
-            $this->getColumns($blueprint)
+        $column = $command->column;
+
+        $sql = sprintf('alter table %s add column %s %s',
+            $this->wrapTable($blueprint),
+            $this->wrap($column),
+            $this->getType($column),
         );
+
+        return $this->addModifiers($sql, $blueprint, $column);
     }
 
     /**
@@ -131,14 +136,19 @@ public function compileAdd(Blueprint $blueprint, Fluent $command)
      * @param  Blueprint  $blueprint
      * @param  Fluent<string, mixed> $command
      * @param  Connection $connection
-     * @return string[]
+     * @return list<string>|string
      */
     public function compileChange(Blueprint $blueprint, Fluent $command, Connection $connection)
     {
-       return $this->prefixArray(
-            'alter table '.$this->wrapTable($blueprint).' alter column',
-            $this->getChangedColumns($blueprint)
+        $column = $command->column;
+
+        $sql = sprintf('alter table %s alter column %s %s',
+            $this->wrapTable($blueprint),
+            $this->wrap($column),
+            $this->getType($column),
         );
+
+        return $this->addModifiers($sql, $blueprint, $column);
     }
 
     /**
@@ -830,6 +840,8 @@ protected function formatTimestampValue(Fluent $column, mixed $value): string
     /**
      * Compile the blueprint's column definitions.
      *
+     * @deprecated Not used anymore. Will be deleted in 9.x.
+     *
      * @param  Blueprint $blueprint
      * @return array<int, string>
      */