diff --git a/CondaPkg.toml b/CondaPkg.toml
index 2a354e8..c5021c9 100644
--- a/CondaPkg.toml
+++ b/CondaPkg.toml
@@ -2,5 +2,5 @@
 [pip.deps]
 pymatching = ""
 ldpc = ""
-numpy = ""
+numpy = "<2"
 scipy = ""
diff --git a/Project.toml b/Project.toml
index 8b82201..f55e547 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "PyQDecoders"
 uuid = "17f5de1a-9b79-4409-a58d-4d45812840f7"
 authors = ["Stefan Krastanov <stefan@krastanov.org>"]
-version = "0.2.0"
+version = "0.2.1"
 
 [deps]
 PythonCall = "6099a3de-0909-46bc-b1f4-468b9a2dfc0d"