diff --git a/src/Collection/ArrayCollection.php b/src/Collection/ArrayCollection.php
index 3e4ba3e0..4abb1e89 100644
--- a/src/Collection/ArrayCollection.php
+++ b/src/Collection/ArrayCollection.php
@@ -166,7 +166,7 @@ public function fetchChecked(): IEntity
 	}
 
 
-	public function fetchAll()
+	public function fetchAll(): array
 	{
 		return iterator_to_array($this->getIterator(), preserve_keys: false);
 	}
diff --git a/src/Collection/DbalCollection.php b/src/Collection/DbalCollection.php
index 6a3b6d88..ca41af86 100644
--- a/src/Collection/DbalCollection.php
+++ b/src/Collection/DbalCollection.php
@@ -179,7 +179,7 @@ public function fetchChecked(): IEntity
 	}
 
 
-	public function fetchAll()
+	public function fetchAll(): array
 	{
 		return iterator_to_array($this->getIterator(), preserve_keys: false);
 	}
diff --git a/src/Collection/EmptyCollection.php b/src/Collection/EmptyCollection.php
index 34dbd2c4..d0e8f4c4 100644
--- a/src/Collection/EmptyCollection.php
+++ b/src/Collection/EmptyCollection.php
@@ -81,7 +81,7 @@ public function fetchChecked(): IEntity
 	}
 
 
-	public function fetchAll()
+	public function fetchAll(): array
 	{
 		return [];
 	}
diff --git a/src/Collection/HasManyCollection.php b/src/Collection/HasManyCollection.php
index a32d1ab4..3e1e0d53 100644
--- a/src/Collection/HasManyCollection.php
+++ b/src/Collection/HasManyCollection.php
@@ -151,7 +151,7 @@ public function fetchChecked(): IEntity
 	}
 
 
-	public function fetchAll()
+	public function fetchAll(): array
 	{
 		return iterator_to_array($this->getIterator(), preserve_keys: false);
 	}
diff --git a/src/Collection/ICollection.php b/src/Collection/ICollection.php
index 404fd4fc..05e36af9 100644
--- a/src/Collection/ICollection.php
+++ b/src/Collection/ICollection.php
@@ -178,10 +178,9 @@ public function fetchChecked(): IEntity;
 
 	/**
 	 * Fetches all records.
-	 * @return IEntity[]
 	 * @return list<E>
 	 */
-	public function fetchAll();
+	public function fetchAll(): array;
 
 
 	/**