diff --git a/setup.py b/setup.py
index fd2f6614..3b89f09d 100755
--- a/setup.py
+++ b/setup.py
@@ -48,13 +48,13 @@
     python_requires='>=3.6',
     install_requires=[
         'Flask>=1.0.0,<3.0',
-        'typeguard',
+        'typeguard==2.12.1',
         'typing;python_version<"3.5"',
         'typing_extensions;python_version<"3.8"',
         'typing_inspect==0.7.1',
     ],
     setup_requires=['pytest-runner'],
-    tests_require=['mock', 'coverage', 'pytest', 'pytest-cov', 'pytest-sugar', 'typeguard'],
+    tests_require=['mock', 'coverage', 'pytest', 'pytest-cov', 'pytest-xdist', 'pytest-sugar', 'typeguard'],
     classifiers=[
         'Environment :: Web Environment',
         'Intended Audience :: Developers',