diff --git a/requirements-wsl.txt b/requirements-wsl.txt
index e25be7c..6afc8a9 100644
--- a/requirements-wsl.txt
+++ b/requirements-wsl.txt
@@ -32,10 +32,13 @@ psycopg2-binary
 # python 2.
 jinja2==3.0.3
 
+# MarkupSafe is a Python library designed to provide a safe way of handling strings that contain data from untrusted sources.
+# compatible with jinja2
+markupsafe==2.0.1
+
 # MarkDown is a popular and familair WYSIWYM markup language.
 # python 2.
 markdown==2.6.11
-markupsafe==2.0.1
 python-markdown-math
 html5lib
 BeautifulSoup4