diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5c94de9b..b694b8cf 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -52,7 +52,7 @@ jobs:
           mkdir gh-pages
           touch gh-pages/.nojekyll
           cd docs/
-          poetry run sphinx-build -b html . _build
+          poetry run sphinx-build --keep-going -b html . _build
           cp -r _build/* ../gh-pages/        
 
       - name: Deploy documentation
diff --git a/mtbp3/stdiso/pdfsummary.py b/mtbp3/stdiso/pdfsummary.py
index d6ac4876..d36d6c4f 100644
--- a/mtbp3/stdiso/pdfsummary.py
+++ b/mtbp3/stdiso/pdfsummary.py
@@ -83,19 +83,6 @@ def __init__(self, path=None):
         self.outline_list = []
 
     def get_image(self, page_index=0, image_index=0, outfolder=""):
-        """
-        Retrieves an image from the PDF summary.
-        Args:
-            page_index (int, optional): The index of the page containing the image. Defaults to 0.
-            image_index (int, optional): The index of the image within the page. Defaults to 0.
-            outfolder (str, optional): The folder to save the image file. Defaults to "".
-        Returns:
-            str or PIL.Image: If `outfolder` is provided, the function saves the image file and returns the file path as a string.
-            Otherwise, it returns the image as a PIL.Image object.
-        Raises:
-            ValueError: If `page_index` or `image_index` is not a non-negative integer, or if they are out of range.
-        """
-
         if (not isinstance(page_index, int)) or (not isinstance(page_index, int)):
             raise ValueError("page_index and image_index must be non-negative integers")
         if page_index < 0 or page_index >= self.summary['n_page']:
diff --git a/pyproject.toml b/pyproject.toml
index c120f3d5..813c0e52 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ pandas = "^2.0.0"
 seaborn = "^0.13.2"
 
 [tool.poetry.dev-dependencies]
-sphinx = { version = "*", optional = false }
+sphinx = { version = "7.4.7", optional = false }
 myst-nb = { version = "*", optional = false }
 sphinx-autoapi = { version = "*", optional = false }
 sphinx_rtd_theme = { version = "*", optional = false }