diff --git a/pyproject.toml b/pyproject.toml
index f1f06209..bfc636b7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,6 +22,7 @@ dependencies = [
   "numpy ~= 1.20",
   "scipy ~= 1.6",
   "opencv-python ~= 4.7.0",
+  "anyio ~= 4.0",
 ]
 
 [project.optional-dependencies]