diff --git a/adam_atan2_pytorch/foreach.py b/adam_atan2_pytorch/foreach.py
index ecceae1..1ff8636 100644
--- a/adam_atan2_pytorch/foreach.py
+++ b/adam_atan2_pytorch/foreach.py
@@ -38,7 +38,7 @@ def __init__(
         assert lr > 0.
         assert all([0. <= beta <= 1. for beta in betas])
         assert weight_decay >= 0.
-        assert all([hasattr(torch, f'_foreach_{attr}_') for attr in ('mul', 'add', 'sign', 'lerp')]), 'this version of torch does not have the prerequisite foreach functions'
+        assert all([hasattr(torch, f'_foreach_{attr}_') for attr in ('mul', 'add', 'lerp', 'sqrt')]), 'this version of torch does not have the prerequisite foreach functions'
 
         self._init_lr = lr
 
diff --git a/pyproject.toml b/pyproject.toml
index 832caa6..dc26459 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "adam-atan2-pytorch"
-version = "0.0.7"
+version = "0.0.8"
 description = "Adam-atan2 for Pytorch"
 authors = [
     { name = "Phil Wang", email = "lucidrains@gmail.com" }