diff --git a/PyCO2SYS/meta.py b/PyCO2SYS/meta.py
index 66f932d..d51ac47 100644
--- a/PyCO2SYS/meta.py
+++ b/PyCO2SYS/meta.py
@@ -2,7 +2,7 @@
 # Copyright (C) 2020--2023  Matthew P. Humphreys et al.  (GNU GPLv3)
 """Define metadata about PyCO2SYS."""
 
-version = "1.8.3.3"
+version = "1.8.3.4"
 version_xyz = "1.8.3"
 authorlist = [
     "Humphreys, Matthew P.",
@@ -42,7 +42,5 @@ def hello():
    Lasciate ogni speranza, voi ch' entrate!
                                     Dante, Inferno iii, 9
                                     sign on the entrance gates of hell
-""".format(
-            version_xyz
-        )
+""".format(version_xyz)
     )  # (All hope abandon, ye who enter here!)
diff --git a/pyproject.toml b/pyproject.toml
index 4431252..046ccd2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,6 @@ name = "PyCO2SYS"
 description = "PyCO2SYS: marine carbonate system calculations in Python"
 readme = "README.md"
 dependencies = [
-    "PyCO2SYS",
     "autograd",
     "numpy",
 ]