diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 5ee0854..78fa99c 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -46,7 +46,7 @@ jobs:
           poetry install --no-interaction
       - name: Check notebook formatting
         run: |
-          poetry run blacken-docs --check book/notebooks/*.md
+          poetry run blacken-docs book/notebooks/*.md
       # Also tests the notebooks thanks to the assertions contained within them
       - name: Build book
         run: |
diff --git a/Makefile b/Makefile
index a63a81e..c8bd701 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ help:  ## print short description of each target
 
 .PHONY: checks
 checks:  ## run all the linting checks of the codebase
-	@echo "=== black docs ==="; poetry run blacken-docs --check book/notebooks/*.md || echo "--- black docs failed ---" >&2; \
+	@echo "=== black docs ==="; poetry run blacken-docs book/notebooks/*.md || echo "--- black docs failed ---" >&2; \
 		echo "======"
 
 .PHONY: docs
diff --git a/pyproject.toml b/pyproject.toml
index cd6105b..4e9e866 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,8 @@ jupyter-book = "^0.15.1"
 jupytext = "^1.14.5"
 
 [tool.poetry.group.dev.dependencies]
-blacken-docs = { git = "https://github.com/znicholls/blacken-docs.git", rev = "8dd86f" }
+# Waiting on https://github.com/adamchainz/blacken-docs/issues/240
+blacken-docs = { git = "https://github.com/znicholls/blacken-docs.git", rev = "27c1f12" }
 tokenize-rt = "^5.0.0"
 commitizen = "^3.1.1"