diff --git a/requirements.txt b/requirements.txt
index 441e833..49be77a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ prompt-toolkit==1.0.15
 ptyprocess==0.5.2
 pycodestyle==2.3.1
 pycparser==2.18
-Pygments==2.2.0
+Pygments==2.7.4
 scandir==1.6
 secp256k1==0.13.2
 simplegeneric==0.8.1