diff --git a/examples/NLU/examples/research_projects/lxmert/requirements.txt b/examples/NLU/examples/research_projects/lxmert/requirements.txt
index 3088f5f0..c6bcac3d 100644
--- a/examples/NLU/examples/research_projects/lxmert/requirements.txt
+++ b/examples/NLU/examples/research_projects/lxmert/requirements.txt
@@ -64,7 +64,7 @@ ptyprocess==0.6.0
 pyaml==20.4.0
 pyarrow==1.0.1
 pycparser==2.20
-Pygments==2.6.1
+Pygments==2.15.0
 pyparsing==2.4.6
 pyrsistent==0.16.0
 python-dateutil==2.8.1