diff --git a/grounding/groundcn/requirements.txt b/grounding/groundcn/requirements.txt
index 4de27ef..2dc0897 100644
--- a/grounding/groundcn/requirements.txt
+++ b/grounding/groundcn/requirements.txt
@@ -15,7 +15,7 @@ numpy==1.22.0
 numpydoc==0.9.2
 packaging==20.0
 pycparser==2.19
-Pygments==2.7.4
+Pygments==2.15.0
 pyparsing==2.4.6
 pyqt5==5.12.0
 pyqtwebengine==5.12