diff --git a/requirements.txt b/requirements.txt
index ec7907c..bfec7ef 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,5 +10,6 @@ pytest-cov>=2.10.1
 pytest-runner>=5.2
 PyYAML>=5.3.1
 scipy>=1.5.4
+typeguard>=4.1.5
 wheel>=0.36