diff --git a/lib/Collection.php b/lib/Collection.php
index 6d7f8dfd9..294ea9ddf 100644
--- a/lib/Collection.php
+++ b/lib/Collection.php
@@ -47,6 +47,7 @@ public function setFilters($filters)
         $this->filters = $filters;
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetGet($k)
     {
         if (\is_string($k)) {
diff --git a/lib/StripeObject.php b/lib/StripeObject.php
index d19ae3def..9482a0e97 100644
--- a/lib/StripeObject.php
+++ b/lib/StripeObject.php
@@ -212,6 +212,7 @@ public function offsetUnset($k)
         unset($this->{$k});
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetGet($k)
     {
         return \array_key_exists($k, $this->_values) ? $this->_values[$k] : null;
@@ -423,6 +424,7 @@ public function serializeParamsValue($value, $original, $unsaved, $force, $key =
         }
     }
 
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return $this->toArray();
diff --git a/lib/Util/CaseInsensitiveArray.php b/lib/Util/CaseInsensitiveArray.php
index 01888e890..9f11dc69e 100644
--- a/lib/Util/CaseInsensitiveArray.php
+++ b/lib/Util/CaseInsensitiveArray.php
@@ -59,6 +59,7 @@ public function offsetUnset($offset)
         unset($this->container[$offset]);
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         $offset = static::maybeLowercase($offset);