diff --git a/pyproject.toml b/pyproject.toml
index 7cd3422210da11513ea59968500bd2e4e88e641e..1e3a1601779622e27411a0928913c31f269051c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ authors = [
 requires-python = ">=3.10"
 dependencies = [
     "matplotlib<=3.9",
-    "numpy>=2.1.3",
+    "numpy>=1.23",
     "pillow>=11.0.0",
     "scipy>=1.14.1",
     "thd-json>=0.1.0",
diff --git a/uv.lock b/uv.lock
index 5f7fc0622ddd1b5f1c2a54234cda71bc3657c331..fa269c3a98ce3e0f7f41d0a71b480e248fc17427 100644
--- a/uv.lock
+++ b/uv.lock
@@ -22,7 +22,7 @@ thd = [
 [package.metadata]
 requires-dist = [
     { name = "matplotlib", specifier = "<=3.9" },
-    { name = "numpy", specifier = ">=2.1.3" },
+    { name = "numpy", specifier = ">=1.23" },
     { name = "pillow", specifier = ">=11.0.0" },
     { name = "scipy", specifier = ">=1.14.1" },
     { name = "thd-json", git = "https://mygit.th-deg.de/roboct-public/roboct-schemas" },