diff --git a/src/Executor.php b/src/Executor.php
index e90a2fe..1fd5804 100644
--- a/src/Executor.php
+++ b/src/Executor.php
@@ -3,8 +3,8 @@
 namespace Amp\Sql;
 
 /**
- * @template TResult extends Result
- * @template TStatement extends Statement
+ * @template TResult of Result
+ * @template TStatement of Statement
  */
 interface Executor extends TransientResource
 {
diff --git a/src/Link.php b/src/Link.php
index 51fb7c4..4e96eb4 100644
--- a/src/Link.php
+++ b/src/Link.php
@@ -3,9 +3,9 @@
 namespace Amp\Sql;
 
 /**
- * @template TResult extends Result
- * @template TStatement extends Statement
- * @template TTransaction extends Transaction
+ * @template TResult of Result
+ * @template TStatement of Statement
+ * @template TTransaction of Transaction
  *
  * @extends Executor<TResult, TStatement>
  */
diff --git a/src/SqlConnector.php b/src/SqlConnector.php
index abb766a..41d1eef 100644
--- a/src/SqlConnector.php
+++ b/src/SqlConnector.php
@@ -5,8 +5,8 @@ namespace Amp\Sql;
 use Amp\Cancellation;
 
 /**
- * @template TConfig extends SqlConfig
- * @template TLink extends Link
+ * @template TConfig of SqlConfig
+ * @template TLink of Link
  */
 interface SqlConnector
 {
diff --git a/src/Statement.php b/src/Statement.php
index 7b9c385..5fe7252 100644
--- a/src/Statement.php
+++ b/src/Statement.php
@@ -3,7 +3,7 @@
 namespace Amp\Sql;
 
 /**
- * @template TResult extends Result
+ * @template TResult of Result
  */
 interface Statement extends TransientResource
 {
diff --git a/src/Transaction.php b/src/Transaction.php
index 58535b3..0b0c675 100644
--- a/src/Transaction.php
+++ b/src/Transaction.php
@@ -3,8 +3,8 @@
 namespace Amp\Sql;
 
 /**
- * @template TResult extends Result
- * @template TStatement extends Statement
+ * @template TResult of Result
+ * @template TStatement of Statement
  * @extends Executor<TResult, TStatement>
  */
 interface Transaction extends Executor