diff --git a/docs/known-warnings.txt b/docs/known-warnings.txt
index c8edd1e6731..fa1e28dcb70 100644
--- a/docs/known-warnings.txt
+++ b/docs/known-warnings.txt
@@ -7,7 +7,5 @@
 .*Duplicate explicit target name: .*class_acts_1_1_axis_aligned_bounding_box_.*
 .*undefined label: .*class_acts_1_1_convex_polygon_bounds_3_01_polygon_dynamic_01_4.*
 .*undefined label: .*class_acts_1_1_grid_surface_material_t.*
-.*undefined label: .*class_acts_1_1_axis_3_01_axis_type_1_1_equidistant_00_01bdt_01_4.*
-.*undefined label: .*class_acts_1_1_axis_3_01_axis_type_1_1_variable_00_01bdt_01_4.*
 # I think these are because we use specialization
 .*undefined label: .*bdt.*
diff --git a/docs/requirements.in b/docs/requirements.in
index f1e8d3c3b2a..1633d176167 100644
--- a/docs/requirements.in
+++ b/docs/requirements.in
@@ -1,6 +1,6 @@
 breathe
 myst-parser
-sphinx==7.4.0
+sphinx==7.3.7
 sphinx_rtd_theme
 docutils
 rich
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 92373028741..0ac5d41d6b6 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -105,7 +105,7 @@ shellingham==1.5.4
     # via typer
 snowballstemmer==2.2.0
     # via sphinx
-sphinx==7.4.0
+sphinx==7.3.7
     # via
     #   -r docs/requirements.in
     #   breathe