diff --git a/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt b/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt
index 26d897a..ec0f9be 100644
--- a/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt
+++ b/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt
@@ -75,7 +75,7 @@ pycodestyle==2.4.0
 pycosat==0.6.3
 pycparser==2.18
 pyflakes==1.6.0
-Pygments==2.2.0
+Pygments==2.7.4
 PyInstaller==3.3.1
 pylint==1.8.4
 pymc3==3.0