diff --git a/src/collections_methods.c b/src/collections_methods.c
index e9946e1..6c2bc94 100644
--- a/src/collections_methods.c
+++ b/src/collections_methods.c
@@ -2366,9 +2366,11 @@ PHP_METHOD(Collection, set)
     zend_array* current = COLLECTION_FETCH_CURRENT();
     if (Z_TYPE_P(key) == IS_STRING) {
         SEPARATE_CURRENT_COLLECTION(current);
+        Z_TRY_ADDREF_P(value);
         zend_hash_update(current, Z_STR_P(key), value);
     } else if (Z_TYPE_P(key) == IS_LONG) {
         SEPARATE_CURRENT_COLLECTION(current);
+        Z_TRY_ADDREF_P(value);
         zend_hash_index_update(current, Z_LVAL_P(key), value);
     } else {
         ERR_BAD_KEY_TYPE();
diff --git a/stubs/Collection.php b/stubs/Collection.php
index 8c3fc56..0b33e21 100644
--- a/stubs/Collection.php
+++ b/stubs/Collection.php
@@ -895,4 +895,4 @@ class Collection implements ArrayAccess, Countable
      * @return Collection
      */
     function values() {}
-}
\ No newline at end of file
+}
diff --git a/stubs/Pair.php b/stubs/Pair.php
index e67d048..726a173 100644
--- a/stubs/Pair.php
+++ b/stubs/Pair.php
@@ -26,4 +26,4 @@ class Pair
      * @param mixed $second
      */
     function __construct($first, $second) {}
-}
\ No newline at end of file
+}