diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index aa9cb86..7fb2c9b 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -18,7 +18,7 @@ build:
       - UV_PROJECT_ENVIRONMENT="${READTHEDOCS_VIRTUALENV_PATH}" uv pip install .
     build:
       html:
-        - zensical build
+        - zensical build --strict
     post_build:
       - mkdir -p $READTHEDOCS_OUTPUT/html/
       - cp --recursive site/* $READTHEDOCS_OUTPUT/html/
diff --git a/pyproject.toml b/pyproject.toml
index 1f3b2e7..c2ea7a2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ dev = [
 ]
 docs = [
     "mkdocstrings[python]~=1.0.2",
-    "zensical==0.0.37",
+    "zensical==0.0.38",
 ]
 lint = [
     "ruff>=0.15.0",
@@ -140,7 +140,7 @@ commands = [
 description = "build the documentation"
 deps = [ "-r ./requirements/docs.requirements.txt" ]
 commands = [
-    [ "zensical", { replace = "posargs", default = [ "build" ], extend = true } ],
+    [ "zensical", { replace = "posargs", default = [ "build", "--strict" ], extend = true } ],
 ]
 
 [tool.pytest.ini_options]
diff --git a/requirements/docs.requirements.txt b/requirements/docs.requirements.txt
index f959a76..87a212a 100644
--- a/requirements/docs.requirements.txt
+++ b/requirements/docs.requirements.txt
@@ -76,5 +76,5 @@ tomli==2.4.1
     # via zensical
 watchdog==6.0.0
     # via mkdocs
-zensical==0.0.37
+zensical==0.0.38
     # via python-backoff (pyproject.toml:docs)