diff --git a/autobuild_requirements.txt b/autobuild_requirements.txt
index df731c42..d9e211aa 100644
--- a/autobuild_requirements.txt
+++ b/autobuild_requirements.txt
@@ -39,7 +39,7 @@ sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
 stevedore==3.5.2
-tornado==6.1
+tornado==6.5
 typing_extensions==4.1.1
 urllib3==1.26.14
 zipp==3.6.0
diff --git a/requirements.txt b/requirements.txt
index 1d4d17ec..2a14e37f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
 standard-imghdr # Needed to fix: "Could not import extension sphinx.builders.epub3 (exception: No module named 'imghdr')"
 stevedore==3.5.2
-tornado==6.1
+tornado==6.5
 typing_extensions==4.1.1
 urllib3==1.26.14
 zipp==3.6.0