diff --git a/chapter1/requirements.txt b/chapter1/requirements.txt
index 758bbda..1b96ebb 100644
--- a/chapter1/requirements.txt
+++ b/chapter1/requirements.txt
@@ -139,7 +139,7 @@ TBB==0.1
 texttable==0.8.1
 tornado==4.4.2
 twilio==5.7.0
-Twisted==16.1.1
+Twisted==22.4.0
 uritemplate.py==0.3.0
 urllib3==1.15.1
 usshapes==0.4.1