diff --git a/src/QueryPath/CSS/Selector.php b/src/QueryPath/CSS/Selector.php
index 4b538bd8..53e923c3 100644
--- a/src/QueryPath/CSS/Selector.php
+++ b/src/QueryPath/CSS/Selector.php
@@ -58,7 +58,7 @@ public function __construct() {
     $this->selectors[$this->groupIndex][] = $this->currSelector;
   }
 
-  public function getIterator() {
+  public function getIterator(): \Traversable {
     return new \ArrayIterator($this->selectors);
   }
 
@@ -73,7 +73,7 @@ public function toArray() {
     return $this->selectors;
   }
 
-  public function count() {
+  public function count(): int {
     return count($this->selectors);
   }
 
diff --git a/src/QueryPath/DOMQuery.php b/src/QueryPath/DOMQuery.php
index 15ab8938..c63346ed 100644
--- a/src/QueryPath/DOMQuery.php
+++ b/src/QueryPath/DOMQuery.php
@@ -364,7 +364,7 @@ public function size() {
    * @return int
    *  The number of matches in the DOMQuery.
    */
-  public function count() {
+  public function count(): int {
     return $this->matches->count();
   }
 
@@ -3985,7 +3985,7 @@ public function __call($name, $arguments) {
    * @return Iterable
    *  Returns an iterator.
    */
-  public function getIterator() {
+  public function getIterator(): \Traversable {
     $i = new QueryPathIterator($this->matches);
     $i->options = $this->options;
     return $i;
diff --git a/src/QueryPath/QueryPathIterator.php b/src/QueryPath/QueryPathIterator.php
index be2e66f0..7648a279 100644
--- a/src/QueryPath/QueryPathIterator.php
+++ b/src/QueryPath/QueryPathIterator.php
@@ -19,7 +19,7 @@ class QueryPathIterator extends \IteratorIterator {
   public $options = array();
   private $qp = NULL;
 
-  public function current() {
+  public function current(): mixed {
     if (!isset($this->qp)) {
       $this->qp = \QueryPath::with(parent::current(), NULL, $this->options);
     }