diff --git a/pyproject.toml b/pyproject.toml
index 680aaf206..5ef9b7d1f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -101,7 +101,7 @@ docs = [
 testing = [
     "build~=1.0",
     "jsondiff~=2.0",
-    "pytest~=8.3",
+    "pytest>=8.3,<10.0",
     "pytest-asyncio>=0.25,<2.0",
     "pytest-cov>=6,<8",
     "optimade[server]",
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 22519031f..77f7e8894 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,10 +2,10 @@ build==1.3.0
 invoke==2.2.1
 jsondiff==2.2.1
 mypy==1.18.2
-pre-commit==4.3.0
-pytest==8.4.2
-pytest-asyncio==1.2.0
+pre-commit==4.5.0
+pytest==9.0.1
+pytest-asyncio==1.3.0
 pytest-cov==7.0.0
-ruff==0.14.0
+ruff==0.14.6
 types-pyyaml
 types-requests