diff --git a/automated_detection_testing/requirements.txt b/automated_detection_testing/requirements.txt
index 0e64cf7268..66340c90e9 100644
--- a/automated_detection_testing/requirements.txt
+++ b/automated_detection_testing/requirements.txt
@@ -4,7 +4,7 @@ apipkg==1.5
 aspy.yaml==1.3.0
 atomicwrites==1.4.0
 attackcti==0.3.4.3
-attrs==20.3.0
+attrs==21.2.0
 azure-common==1.1.27
 azure-core==1.14.0
 azure-identity==1.6.0
diff --git a/requirements.txt b/requirements.txt
index a4fbf913ca..1ba7e5fee7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ antlr4-python3-runtime==4.9.2
 appdirs==1.4.4
 aspy.yaml==1.3.0
 attackcti==0.3.4.3
-attrs==20.3.0
+attrs==21.2.0
 CacheControl==0.12.6
 certifi==2020.12.5
 cfgv==3.3.0