diff --git a/src/conf.py b/src/conf.py
index dc5b85a64..5372dd91d 100644
--- a/src/conf.py
+++ b/src/conf.py
@@ -362,7 +362,7 @@
 imgmath_image_format = 'svg'
 imgmath_dvisvgm_args = ['--no-fonts', '--exact']
 
-#math_number_all = True
+math_number_all = True
 math_numfig = True
 numfig = True
 numfig_secnum_depth = 3