diff --git a/doc/conf.py b/doc/conf.py
index a131003a5a..a195d4727c 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -237,6 +237,7 @@ preamble ="""
 \usepackage{mymath}\usepackage{amssymb}\usepackage{amsmath}\usepackage{bbm}\setcounter{secnumdepth}{1}
 \usepackage{colortbl}
 \usepackage{enumitem}
+\setlist{labelsep=1ex}
 """
 
 latex_elements = {'preamble': preamble}
diff --git a/doc/opencv2refman.pdf b/doc/opencv2refman.pdf
index f9feff670c..6eb15ddae2 100644
Binary files a/doc/opencv2refman.pdf and b/doc/opencv2refman.pdf differ
diff --git a/doc/opencv_tutorials.pdf b/doc/opencv_tutorials.pdf
index d59435f2cf..44d0d0e25e 100644
Binary files a/doc/opencv_tutorials.pdf and b/doc/opencv_tutorials.pdf differ
diff --git a/doc/opencv_user.pdf b/doc/opencv_user.pdf
index bbe5b7a7c2..d17a332564 100644
Binary files a/doc/opencv_user.pdf and b/doc/opencv_user.pdf differ