diff --git a/poetry.lock b/poetry.lock
index 9a2e965..21ed51b 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -590,17 +590,17 @@ dev = ["argcomplete", "attrs (>=19.2)", "hypothesis (>=3.56)", "mock", "pygments
 
 [[package]]
 name = "pytest-cov"
-version = "5.0.0"
+version = "6.0.0"
 description = "Pytest plugin for measuring coverage."
 optional = false
-python-versions = ">=3.8"
+python-versions = ">=3.9"
 files = [
-    {file = "pytest-cov-5.0.0.tar.gz", hash = "sha256:5837b58e9f6ebd335b0f8060eecce69b662415b16dc503883a02f45dfeb14857"},
-    {file = "pytest_cov-5.0.0-py3-none-any.whl", hash = "sha256:4f0764a1219df53214206bf1feea4633c3b558a2925c8b59f144f682861ce652"},
+    {file = "pytest-cov-6.0.0.tar.gz", hash = "sha256:fde0b595ca248bb8e2d76f020b465f3b107c9632e6a1d1705f17834c89dcadc0"},
+    {file = "pytest_cov-6.0.0-py3-none-any.whl", hash = "sha256:eee6f1b9e61008bd34975a4d5bab25801eb31898b032dd55addc93e96fcaaa35"},
 ]
 
 [package.dependencies]
-coverage = {version = ">=5.2.1", extras = ["toml"]}
+coverage = {version = ">=7.5", extras = ["toml"]}
 pytest = ">=4.6"
 
 [package.extras]
@@ -767,4 +767,4 @@ cffi = ["cffi (>=1.11)"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.10,<3.14"
-content-hash = "1cebb52791fcb3122f4ef3cdff7d77ae2ae77dddb97ed449dc737e3e5f3ca04a"
+content-hash = "0cec86d0a7e379ca421cbc36dd068edb5e0d3b4f702677166700a8cb85e591d2"
diff --git a/pyproject.toml b/pyproject.toml
index e53f11a..6cb6bbc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ imageio = [
 pillow = "^10.3.0"
 pylint = "^3.3.1"
 pytest = "^8.3.3"
-pytest-cov = "^5.0.0"
+pytest-cov = "^6.0.0"
 
 [tool.poetry.scripts]
 xitomatl = "xitomatl.__main__:main"