diff --git a/poetry.lock b/poetry.lock
index cc4d527..b31bdd3 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -501,14 +501,14 @@ natsort = "*"
 
 [[package]]
 name = "mkdocs-material"
-version = "9.1.3"
+version = "9.1.5"
 description = "Documentation that simply works"
 category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "mkdocs_material-9.1.3-py3-none-any.whl", hash = "sha256:a8d14d03569008afb0f5a5785c253249b5ff038e3a5509f96a393b8596bf5062"},
-    {file = "mkdocs_material-9.1.3.tar.gz", hash = "sha256:0be1b5d76c00efc9b2ecbd2d71014be950351e710f5947f276264878afc82ca0"},
+    {file = "mkdocs_material-9.1.5-py3-none-any.whl", hash = "sha256:981e1ef0250e2fbcc23610e9b20e5f242fe1f808079b9bcfbb6c49aa2999343c"},
+    {file = "mkdocs_material-9.1.5.tar.gz", hash = "sha256:744519bca52b1e8fe7c2e80e15ed59baf8948111ec763ae6ae629c409bd16d6e"},
 ]
 
 [package.dependencies]
@@ -966,4 +966,4 @@ testing = ["func-timeout", "jaraco.itertools", "jaraco.test (>=3.2.0)", "pytest
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.7"
-content-hash = "fc055ecd3fc7c3502196c0c78f5c775b2d16f465885152d523b4fcb452655fc5"
+content-hash = "9f83036746721500743019700632d9504424ff2ab47a68b08840441e0f06861c"
diff --git a/pyproject.toml b/pyproject.toml
index 136b489..7b11cf2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ python = "^3.7"
 # main
 mkdocs = "^1.3"
 # themes
-mkdocs-material = "9.1.3"
+mkdocs-material = "9.1.5"
 mkdocs-rtd-dropdown = "1.0.2"
 mkdocs-gitbook = "0.0.1"
 mkdocs-ivory = "0.4.6"