diff --git a/pyproject.toml b/pyproject.toml
index d1bbf29..5807678 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ classifiers = [
 ]
 
 dependencies = [
-    "numpy>=1.19",
+    "numpy~=1.19",
     "pytest>=6.2",
     "tqdm"
 ]