diff --git a/requirements.txt b/requirements.txt
index 67f923c..b13c0ff 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,9 +46,9 @@ more-itertools==8.2.0 \
 importlib-metadata==1.5.0 \
     --hash=sha256:06f5b3a99029c7134207dd882428a66992a9de2bef7c2b699b5641f9886c3302 \
     --hash=sha256:b97607a1a18a5100839aec1dc26a1ea17ee0d93b20b0f008d80a5a050afb200b
-attrs==19.3.0 \
-    --hash=sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c \
-    --hash=sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72
+attrs==21.1.0 \
+    --hash=sha256:8ee1e5f5a1afc5b19bdfae4fdf0c35ed324074bdce3500c939842c8f818645d9 \
+    --hash=sha256:3901be1cb7c2a780f14668691474d9252c070a756be0a9ead98cfeabfa11aeb8
 six==1.14.0 \
     --hash=sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a \
     --hash=sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c