diff --git a/m3u8/parser.py b/m3u8/parser.py
index 3f511e3c..5fceccfa 100644
--- a/m3u8/parser.py
+++ b/m3u8/parser.py
@@ -8,7 +8,11 @@
 import re
 from urllib.parse import urljoin as _urljoin
 
-import iso8601
+try:
+    from iso8601 import parse_date
+except ImportError:
+    parse_date = datetime.datetime.fromisoformat
+
 
 from m3u8 import protocol
 
@@ -20,7 +24,7 @@
 
 
 def cast_date_time(value):
-    return iso8601.parse_date(value)
+    return parse_date(value)
 
 
 def format_date_time(value, **kwargs):
diff --git a/requirements.txt b/requirements.txt
index 57c80f08..f2d13e13 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-iso8601
+iso8601; python_version < '3.11'
diff --git a/setup.py b/setup.py
index d9a95375..f1c01d4a 100644
--- a/setup.py
+++ b/setup.py
@@ -23,5 +23,5 @@
     url="https://github.com/globocom/m3u8",
     description="Python m3u8 parser",
     long_description=long_description,
-    python_requires=">=3.6",
+    python_requires=">=3.7",
 )