diff --git a/test-requirements.txt b/test-requirements.txt
index c18b0df..0cd7a62 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -87,8 +87,8 @@ pyparsing==2.4.7 \
     --hash=sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1 \
     --hash=sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b \
     # via -r ./test-requirements.txt, packaging
-pyrsistent==0.16.0 \
-    --hash=sha256:28669905fe725965daa16184933676547c5bb40a5153055a8dee2a4bd7933ad3 \
+pyrsistent==0.17.3 \
+    --hash=sha256:2e636185d9eb976a18a8a8e96efce62f2905fea90041958d8cc2a189756ebf3e \
     # via -r ./test-requirements.txt, jsonschema
 pytest-cov==2.10.0 \
     --hash=sha256:1a629dc9f48e53512fcbfda6b07de490c374b0c83c55ff7a1720b3fccff0ac87 \