diff --git a/services/openlr-resolver/pyproject.toml b/services/openlr-resolver/pyproject.toml
index 3d83ff9..3964b20 100644
--- a/services/openlr-resolver/pyproject.toml
+++ b/services/openlr-resolver/pyproject.toml
@@ -22,7 +22,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "pytest==8.4.2",
+    "pytest==9.1.1",
     "httpx==0.28.1",
 ]
 
diff --git a/services/openlr-resolver/requirements-dev.in b/services/openlr-resolver/requirements-dev.in
index 075cd95..9b8fa9b 100644
--- a/services/openlr-resolver/requirements-dev.in
+++ b/services/openlr-resolver/requirements-dev.in
@@ -5,7 +5,7 @@
 # requirements-dev.txt, generated by:
 #   pip-compile --generate-hashes requirements-dev.in
 -r requirements.in
-pytest==8.4.2
+pytest==9.1.1
 httpx==0.28.1
 testcontainers==4.14.2
 ruff