diff --git a/requirements.txt b/requirements.txt
index b6c8d67..681f2b6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -55,7 +55,7 @@ requests==2.18.4
 scrypt==0.8.0
 six==1.11.0
 tqdm==4.19.5
-Twisted==17.9.0
+Twisted==21.2.0
 urllib3==1.22
 virtualenv==15.1.0
 wcwidth==0.1.7
diff --git a/requirements_docs.txt b/requirements_docs.txt
index 1f29ded..b968005 100644
--- a/requirements_docs.txt
+++ b/requirements_docs.txt
@@ -61,7 +61,7 @@ Sphinx==1.6.6
 sphinx-rtd-theme==0.2.4
 sphinxcontrib-websupport==1.0.1
 tqdm==4.19.5
-Twisted==17.9.0
+Twisted==21.2.0
 urllib3==1.22
 virtualenv==15.1.0
 wcwidth==0.1.7