diff --git a/actions/create_unique_testpypi_version/requirements.txt b/actions/create_unique_testpypi_version/requirements.txt
index 52c6af41..e820188d 100644
--- a/actions/create_unique_testpypi_version/requirements.txt
+++ b/actions/create_unique_testpypi_version/requirements.txt
@@ -12,7 +12,7 @@ pydantic-core==2.23.4
 pypi-simple==1.6.1
 requests==2.32.3
 soupsieve==2.6
-tomli==2.0.2
+tomli==2.1.0
 tomli-w==1.1.0
 typing-extensions==4.12.2
 urllib3==2.2.3
diff --git a/pyproject.toml b/pyproject.toml
index 27e78153..47c20f79 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ python = "~3.12"  # This needs to stay in sync with all CI workflows
 [tool.poetry.group.actions-create_unique_testpypi_version.dependencies]
 poetry-core = "1.9.1"
 pypi-simple = "1.6.1"
-tomli = "2.0.2"
+tomli = "2.1.0"
 tomli-w = "1.1.0"
 
 [tool.poetry.group.actions-find_unreleased_changelog_items.dependencies]
@@ -71,7 +71,7 @@ mkdocs-spellcheck = "^1.1.0"
 pygments = "^2.17.2"
 pymdown-extensions = "^10.8.1"
 symspellpy = "^6.7.7"
-tomli = "2.0.2"
+tomli = "2.1.0"
 
 [tool.poetry.group.tests.dependencies]
 coverage = "^7.5.0"