diff --git a/test-requirements.txt b/test-requirements.txt
index c18b0df..27d0d85 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,9 +2,9 @@ astroid==2.4.2 \
     --hash=sha256:2f4078c2a41bf377eea06d71c9d2ba4eb8f6b1af2135bec27bbbb7d8f12bb703 \
     --hash=sha256:bc58d83eb610252fd8de6363e39d4f1d0619c894b0ed24603b881c02e64c7386 \
     # via -r ./test-requirements.txt
-attrs==19.3.0 \
-    --hash=sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c \
-    --hash=sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72 \
+attrs==21.2.0 \
+    --hash=sha256:149e90d6d8ac20db7a955ad60cf0e6881a3f20d37096140088356da6c716b0b1 \
+    --hash=sha256:ef6aaac3ca6cd92904cdd0d83f629a15f18053ec84e6432106f7a4d04ae4f5fb \
     # via -r ./test-requirements.txt, jsonschema, pytest
 coverage==5.1 \
     --hash=sha256:00f1d23f4336efc3b311ed0d807feb45098fc86dee1ca13b3d6768cdab187c8a \