diff --git a/mkdocs.yml b/mkdocs.yml
index 540bf459..3d16d5ab 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -15,6 +15,8 @@ theme:
   favicon: 'images/logo.svg'
   custom_dir: 'docs/custom_theme/'
   features:
+    # Material 9 made code copy buttons opt-in; 8.x injected them always
+    - content.code.copy
     - navigation.tabs
     # - navigation.instant # Not compatible with i18n plugin
     - navigation.tabs.sticky
diff --git a/pyproject.toml b/pyproject.toml
index 04837eca..cb50f304 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,9 +47,9 @@ lint = [
     "yapf==0.43.0",
 ]
 docs = [
-    "mkdocs==1.4.2",
+    "mkdocs==1.6.1",
     "mkdocs-click==0.7.0",
-    "mkdocs-material==8.2.11",
+    "mkdocs-material==9.7.7",
     "mkdocstrings==0.18.1",
     "mkdocs_autorefs==1.0.1",
     "mkdocs-macros-plugin==1.3.7"