diff --git a/environment.yml b/environment.yml
index d77b13d2..61efdd1b 100644
--- a/environment.yml
+++ b/environment.yml
@@ -6,13 +6,13 @@ channels:
 
 dependencies:
   - python >=3.10
-  - pyfive >=0.5.0  # earliest support for advanced Pyfive
+  - pyfive >=1.1.1
   - cbor2
   - fsspec
   - h5netcdf
   - netcdf4
   - numcodecs >=0.12  # github.com/valeriupredoi/PyActiveStorage/issues/162
-  - numpy !=1.24.3  # severe masking bug
+  - numpy >=2
   - pip !=21.3
   - requests
   - s3fs >=2024.2.0  # loose s3fs deps leading to old aiobotocore for <2024.2.0
diff --git a/pyproject.toml b/pyproject.toml
index eccabb92..16c25947 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,8 +39,8 @@ dependencies = [
     "h5netcdf",
     "netcdf4",
     "numcodecs>=0.12",  # github/issues/162
-    "numpy!=1.24.3",  # severe masking bug
-    "pyfive>=0.5.0",  # earliest support for advanced Pyfive 
+    "numpy>=2",
+    "pyfive>=1.1.1",
     "requests",
     "s3fs>=2024.2.0",  # see environment.yml for pin reason
     "ujson",