diff --git a/backend/cosmetology-app/lambdas/python/common/requirements-dev.in b/backend/cosmetology-app/lambdas/python/common/requirements-dev.in
index 1f0533a76..faf46865d 100644
--- a/backend/cosmetology-app/lambdas/python/common/requirements-dev.in
+++ b/backend/cosmetology-app/lambdas/python/common/requirements-dev.in
@@ -1,5 +1,5 @@
 # Keep attrs on 25.x to match root requirements.txt (jsii/cattrs); avoids pip-sync conflicts.
-attrs>=25.4,<26
+attrs>=26.1.0,<27
 moto[all]>=5.0.12, <6
 boto3-stubs[full]
 Faker>=40, <41
diff --git a/backend/cosmetology-app/lambdas/python/common/requirements-dev.txt b/backend/cosmetology-app/lambdas/python/common/requirements-dev.txt
index a30103cc2..af13aba67 100644
--- a/backend/cosmetology-app/lambdas/python/common/requirements-dev.txt
+++ b/backend/cosmetology-app/lambdas/python/common/requirements-dev.txt
@@ -8,7 +8,7 @@ annotated-types==0.7.0
     # via pydantic
 antlr4-python3-runtime==4.13.2
     # via moto
-attrs==25.4.0
+attrs==26.1.0
     # via
     #   -r common/requirements-dev.in
     #   jsonschema