diff --git a/oskar-py/meta.yaml b/oskar-py/meta.yaml
index bf79081..1192136 100644
--- a/oskar-py/meta.yaml
+++ b/oskar-py/meta.yaml
@@ -14,11 +14,13 @@ requirements:
   build:
     - python      {{ python }}
     - pip
+    - numpy       >=1.21, !=1.24.0
     - oskar       =={{ OSKARPY_VERSION_ALT }}
 
   host:
     - python      {{ python }}
     - pip
+    - numpy       >=1.21, !=1.24.0
     - oskar       =={{ OSKARPY_VERSION_ALT }}
 
   run:
diff --git a/oskar/meta.yaml b/oskar/meta.yaml
index 37908a1..d56371e 100644
--- a/oskar/meta.yaml
+++ b/oskar/meta.yaml
@@ -16,12 +16,22 @@ requirements:
     - {{ compiler('cxx') }}
     - cmake
     - make
+    - casacore
+    - harp
+    - hdf5
+    - pyopencl
 
   host:
     - casacore
+    - harp
+    - hdf5
+    - pyopencl
 
   run:
     - casacore
+    - harp
+    - hdf5
+    - pyopencl
 
 about:
   home: https://github.com/OxfordSKA/OSKAR