diff --git a/poetry.lock b/poetry.lock
index 327697e..8c685e5 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1688,6 +1688,24 @@ files = [
 dev = ["build", "hatch"]
 doc = ["sphinx"]
 
+[[package]]
+name = "tinycss2"
+version = "1.4.0"
+description = "A tiny CSS parser"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "tinycss2-1.4.0-py3-none-any.whl", hash = "sha256:3a49cf47b7675da0b15d0c6e1df8df4ebd96e9394bb905a5775adb0d884c5289"},
+    {file = "tinycss2-1.4.0.tar.gz", hash = "sha256:10c0972f6fc0fbee87c3edb76549357415e94548c1ae10ebccdea16fb404a9b7"},
+]
+
+[package.dependencies]
+webencodings = ">=0.4"
+
+[package.extras]
+doc = ["sphinx", "sphinx_rtd_theme"]
+test = ["pytest", "ruff"]
+
 [[package]]
 name = "types-bleach"
 version = "6.1.0.20240331"
@@ -1808,4 +1826,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.12.1"
-content-hash = "e0397430b21e0e6d554829f00815a79b3338c3ab905c36ce8e27624c6a160984"
+content-hash = "e8da40d9807b15fc29e1852eded4b2de744dd921fbb3e3797cda0312a175bb8d"
diff --git a/pyproject.toml b/pyproject.toml
index b312bdb..69395c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,6 +28,7 @@ faker = "^25.0.1"
 pytest-django = "^4.8.0"
 bleach = "^6.1.0"
 types-bleach = "^6.1.0.20240331"
+tinycss2 = "^1.4.0"
 
 [tool.poetry.group.dev.dependencies]
 pre-commit = "^3.5.0"
diff --git a/requirements.txt b/requirements.txt
index 10f5b66..fbeabe9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -59,6 +59,7 @@ six==1.16.0 ; python_full_version >= "3.12.1" and python_full_version < "4.0.0"
 social-auth-app-django==5.4.2 ; python_full_version >= "3.12.1" and python_version < "4.0"
 social-auth-core==4.5.4 ; python_full_version >= "3.12.1" and python_version < "4.0"
 sqlparse==0.5.1 ; python_full_version >= "3.12.1" and python_version < "4.0"
+tinycss2==1.4.0 ; python_full_version >= "3.12.1" and python_full_version < "4.0.0"
 types-bleach==6.1.0.20240331 ; python_full_version >= "3.12.1" and python_full_version < "4.0.0"
 types-html5lib==1.1.11.20240228 ; python_full_version >= "3.12.1" and python_full_version < "4.0.0"
 tzdata==2024.1 ; python_full_version >= "3.12.1" and python_version < "4.0"