diff --git a/poetry.lock b/poetry.lock
index 805f809..0af3b44 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -314,7 +314,7 @@ reference = "oxionics"
 [metadata]
 lock-version = "1.1"
 python-versions = "~3.8"
-content-hash = "477acb5a615af85cf90a86a23127d3fb18990547a2ecc953340d9b7371676b26"
+content-hash = "6275bbedc9072c88050cbb38ae47c17196b2346787c421a6cfbb0da179d01144"
 
 [metadata.files]
 black = [
diff --git a/pyproject.toml b/pyproject.toml
index 8132d5d..be2bfe8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ default = true
 
 [tool.poetry.dependencies]
 python = "~3.8"
-numpy = "^1.22.0"
+numpy = "^1.21.0"
 scipy = "^1.7.3"
 sipyco = "^1.2.42"
 pyqt5 = "^5.15.6"