diff --git a/poetry.lock b/poetry.lock
index 19375f2..908bbd9 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1221,13 +1221,13 @@ rtd = ["ipython", "myst-nb", "sphinx", "sphinx-book-theme", "sphinx-examples"]
 
 [[package]]
 name = "sphinx-design"
-version = "0.5.0"
+version = "0.6.0"
 description = "A sphinx extension for designing beautiful, view size responsive web components."
 optional = false
-python-versions = ">=3.8"
+python-versions = ">=3.9"
 files = [
-    {file = "sphinx_design-0.5.0-py3-none-any.whl", hash = "sha256:1af1267b4cea2eedd6724614f19dcc88fe2e15aff65d06b2f6252cee9c4f4c1e"},
-    {file = "sphinx_design-0.5.0.tar.gz", hash = "sha256:e8e513acea6f92d15c6de3b34e954458f245b8e761b45b63950f65373352ab00"},
+    {file = "sphinx_design-0.6.0-py3-none-any.whl", hash = "sha256:e9bd07eecec82eb07ff72cb50fc3624e186b04f5661270bc7b62db86c7546e95"},
+    {file = "sphinx_design-0.6.0.tar.gz", hash = "sha256:ec8e3c5c59fed4049b3a5a2e209360feab31829346b5f6a0c7c342b894082192"},
 ]
 
 [package.dependencies]
@@ -1236,11 +1236,12 @@ sphinx = ">=5,<8"
 [package.extras]
 code-style = ["pre-commit (>=3,<4)"]
 rtd = ["myst-parser (>=1,<3)"]
-testing = ["myst-parser (>=1,<3)", "pytest (>=7.1,<8.0)", "pytest-cov", "pytest-regressions"]
-theme-furo = ["furo (>=2023.7.0,<2023.8.0)"]
-theme-pydata = ["pydata-sphinx-theme (>=0.13.0,<0.14.0)"]
-theme-rtd = ["sphinx-rtd-theme (>=1.0,<2.0)"]
-theme-sbt = ["sphinx-book-theme (>=1.0,<2.0)"]
+testing = ["defusedxml", "myst-parser (>=1,<3)", "pytest (>=7.1,<8.0)", "pytest-cov", "pytest-regressions"]
+theme-furo = ["furo (>=2024.5.4,<2024.6.0)"]
+theme-im = ["sphinx-immaterial (>=0.11.11,<0.12.0)"]
+theme-pydata = ["pydata-sphinx-theme (>=0.15.2,<0.16.0)"]
+theme-rtd = ["sphinx-rtd-theme (>=2.0,<3.0)"]
+theme-sbt = ["sphinx-book-theme (>=1.1,<2.0)"]
 
 [[package]]
 name = "sphinx-rtd-theme"
@@ -1484,4 +1485,4 @@ testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "p
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "265c5889c3c79ec6e30b2fe0e2fd79a138aeec99531c378ae20e0a22e1ea5709"
+content-hash = "6c3386a1ce7c6ce666e5aa5dd31e9995ad550a45dcc056293711f328cb643021"
diff --git a/pyproject.toml b/pyproject.toml
index 33dc871..1084346 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,7 +47,7 @@ sphinx = ">=7.1,<7.4"
 myst-parser = ">=2,<4"
 sphinx-rtd-theme = ">=1.2.2,<3.0.0"
 sphinx-copybutton = "^0.5.2"
-sphinx-design = "^0.5.0"
+sphinx-design = ">=0.5,<0.7"
 
 [tool.poetry.scripts]
 sync-ics2gcal = "sync_ics2gcal.sync_calendar:main"