diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 905ebb2..5ea60cc 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.6.0
+  rev: v5.0.0
   hooks:
     - id: trailing-whitespace
     - id: check-ast
@@ -50,7 +50,7 @@ repos:
     - id: add-trailing-comma
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.6.3
+  rev: v0.6.9
   hooks:
     - id: ruff
       args: ["--fix", "--show-fixes"]
@@ -73,7 +73,7 @@ repos:
     - id: nb-strip-paths
 
 - repo: https://github.com/tox-dev/pyproject-fmt
-  rev: 2.2.1
+  rev: 2.2.4
   hooks:
     - id: pyproject-fmt
 
diff --git a/gliderpy/plotting.py b/gliderpy/plotting.py
index 88c88e5..ccd78c1 100644
--- a/gliderpy/plotting.py
+++ b/gliderpy/plotting.py
@@ -56,7 +56,7 @@ def plot_transect(
     :param var: variable to colour the scatter plot
     :return: figure, axes
     """
-    cmap = kw.get("cmap", None)
+    cmap = kw.get("cmap")
 
     fignums = plt.get_fignums()
     if ax is None and not fignums: