diff --git a/doc/sphinx/conf.py b/doc/sphinx/conf.py
index 557d5ef1..50b6de96 100644
--- a/doc/sphinx/conf.py
+++ b/doc/sphinx/conf.py
@@ -28,13 +28,13 @@
 # -- Project information -----------------------------------------------------
 
 project = u'NEML'
-copyright = u'2023, UChicago Argonne, LLC'
+copyright = u'2024, UChicago Argonne, LLC'
 author = u'Argonne National Laboratory'
 
 # The short X.Y version
-version = u'1.5.2'
+version = u'1.5.3'
 # The full version, including alpha/beta/rc tags
-release = u'1.5.2'
+release = u'1.5.3'
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/setup.py b/setup.py
index 771b802c..c0a541f2 100644
--- a/setup.py
+++ b/setup.py
@@ -78,7 +78,7 @@ def build_extension(self, ext):
     # Name of the project
     name = 'neml',
     # Version
-    version = '1.5.2',
+    version = '1.5.3',
     # One line-description
     description = "Nuclear Engineering Material model Library",
     # README
@@ -99,7 +99,7 @@ def build_extension(self, ext):
       'Operating System :: OS Independent'
       ],
     # Which version of python is needed
-    python_requires='>=3.6',
+    python_requires='>=3.8',
     # Keywords to help find
     keywords='materials structures modeling',
     # Definitely not zip safe