diff --git a/src/Db/Drivers/PdoPgsql/Statement.php b/src/Db/Drivers/PdoPgsql/Statement.php
index 96b2707..e7fd90a 100644
--- a/src/Db/Drivers/PdoPgsql/Statement.php
+++ b/src/Db/Drivers/PdoPgsql/Statement.php
@@ -303,8 +303,7 @@ public function rewind(): void
     /**
      * {@inheritDoc}
      */
-    #[\ReturnTypeWillChange]
-    public function valid()
+    public function valid(): bool
     {
         return false !== $this->current();
     }
diff --git a/src/Db/Drivers/Swoole/Statement.php b/src/Db/Drivers/Swoole/Statement.php
index 1629565..0f15799 100644
--- a/src/Db/Drivers/Swoole/Statement.php
+++ b/src/Db/Drivers/Swoole/Statement.php
@@ -375,8 +375,7 @@ public function rewind(): void
     /**
      * {@inheritDoc}
      */
-    #[\ReturnTypeWillChange]
-    public function valid()
+    public function valid(): bool
     {
         return false !== $this->current();
     }
diff --git a/src/Db/Query/Builder/BaseBuilder.php b/src/Db/Query/Builder/BaseBuilder.php
index 6246725..2c01b78 100644
--- a/src/Db/Query/Builder/BaseBuilder.php
+++ b/src/Db/Query/Builder/BaseBuilder.php
@@ -45,10 +45,8 @@ protected function parseField(array $fields): string
 
     /**
      * limit.
-     *
-     * @return string
      */
-    protected function parseLimit(?int $offset, ?int $limit)
+    protected function parseLimit(?int $offset, ?int $limit): string
     {
         if (null === $limit)
         {