From 34fe792fad73d370362cf68b8442fb52656c5db0 Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Mon, 27 Sep 2021 18:31:46 -0400
Subject: [PATCH] freeze versions of pip packages for processing the manual of
 the stable version

this way we avoid surprises in case one of the packages get updated
to an incompatible new version. these are know-to-work versions.
---
 doc/utils/requirements.txt | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/doc/utils/requirements.txt b/doc/utils/requirements.txt
index 7e4563a1ec..f367727d20 100644
--- a/doc/utils/requirements.txt
+++ b/doc/utils/requirements.txt
@@ -1,7 +1,7 @@
 Sphinx==4.0.3
-sphinxcontrib-spelling
+sphinxcontrib-spelling==7.2.1
 git+git://github.com/akohlmey/sphinx-fortran@parallel-read
-sphinx_tabs
-breathe
-Pygments
-six
+sphinx_tabs==3.2.0
+breathe==4.31.0
+Pygments==2.10.0
+six==1.16.0