diff --git a/panflute/containers.py b/panflute/containers.py
index e5cd86d..10ab229 100644
--- a/panflute/containers.py
+++ b/panflute/containers.py
@@ -97,7 +97,7 @@ def __eq__(self, other):
             return False
         if len(self.list) != len(other.list):
             return False
-        for x, y in zip(self.list, other.list, strict=True):
+        for x, y in zip(self.list, other.list):  # , strict=True
             if x != y:
                 return False
         return True
diff --git a/panflute/version.py b/panflute/version.py
index 794ed2a..10210ed 100644
--- a/panflute/version.py
+++ b/panflute/version.py
@@ -2,4 +2,4 @@
 Panflute version
 """
 
-__version__ = '2.2.2'
+__version__ = '2.2.3'