diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
new file mode 100644
index 0000000..4b7c9db
--- /dev/null
+++ b/.github/workflows/pull_request.yml
@@ -0,0 +1,14 @@
+name: Pull Request
+on:
+  pull_request:
+    types: [opened]
+jobs:
+  test:
+    name: Tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Create venv
+        run: make venv
+      - name: Run tests
+        run: make test
diff --git a/.github/workflows/main.yml b/.github/workflows/release.yml
similarity index 88%
rename from .github/workflows/main.yml
rename to .github/workflows/release.yml
index 87a0f95..51fba09 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/release.yml
@@ -1,13 +1,10 @@
-name: Tests
+name: Release
 on:
   push:
     branches: [ master ]
-  pull_request:
-    branches: [ master ]
-  workflow_dispatch:
 jobs:
   test:
-    name: "Tests"
+    name: Tests
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
diff --git a/README.md b/README.md
index 865d753..9f04842 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 Pynamodb Utils is a collection of small helper functions, utilities and classes which make common patterns easier. It helped me make my job easier in the past.
 
-[![Tests](https://github.com/micmurawski/pynamodb-utils/actions/workflows/main.yml/badge.svg)](https://github.com/micmurawski/pynamodb-utils/actions/workflows/main.yml) [![pypi](https://img.shields.io/pypi/v/pynamodb-utils.svg)](https://pypi.org/project/pynamodb-utils/)
+[![Tests](https://github.com/micmurawski/pynamodb-utils/actions/workflows/release.yml/badge.svg)](https://github.com/micmurawski/pynamodb-utils/actions/workflows/release.yml) [![pypi](https://img.shields.io/pypi/v/pynamodb-utils.svg)](https://pypi.org/project/pynamodb-utils/)
 
 ## Examples are:
 
diff --git a/setup.py b/setup.py
index dc54029..3a3772d 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@ def read(*parts):
             'tests',
         )
     ),
-    install_requires=["pynamodb>=5.0.0"],
+    install_requires=["pynamodb>=5.0.0,<6.0.0"],
     include_package_data=True,
     python_requires=">=3.6",
     license="MIT",