diff --git a/.circleci/config.yml b/.circleci/config.yml
index 84031bcc0..2b3947cd9 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -387,7 +387,7 @@ jobs:
       - run:
           name: hack sphinx_immaterial
           command: |
-            sed -i 's/max_workers=32/max_workers=1/' /mnt/ramdisk/.venv/lib/py*/site-packages/sphinx_immaterial/google_fonts.py
+            sed -i 's/max_workers=33/max_workers=2/' /mnt/ramdisk/.venv/lib/py*/site-packages/sphinx_immaterial/google_fonts.py
 
       - run:
           name: build docs
diff --git a/poetry.lock b/poetry.lock
index e4c4c2782..aa8f6815d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -3646,4 +3646,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "4bb79a380c6a853a1546f79b68ddec0c8a15f32c6b1abc273670c1dcbbc2928f"
+content-hash = "e23719289586ec09a7587ec3e7b1a11fe473d846af92d209a6ac5507496889c5"
diff --git a/pyproject.toml b/pyproject.toml
index 226d7f3f3..3e241b763 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -83,7 +83,7 @@ httpx = "^0.24.0"
 [tool.poetry.group.docs.dependencies]
 sphinx = "^6.1.3"
 sphinxcontrib-spelling = "^8.0.0"
-sphinx-immaterial = "^0.11.3"
+sphinx-immaterial = "^0.11.4"
 
 [tool.poetry.scripts]
 irrd = 'irrd.daemon.main:main'