diff --git a/pkg_defs/mica/meta.yaml b/pkg_defs/mica/meta.yaml
index 544852c1..cec1bbe7 100644
--- a/pkg_defs/mica/meta.yaml
+++ b/pkg_defs/mica/meta.yaml
@@ -3,7 +3,7 @@ package:
   version:  {{ GIT_DESCRIBE_TAG }}
 
 build:
-  noarch: python
+  noarch: generic
   script_env:
     - SKA_TOP_SRC_DIR
 
@@ -27,7 +27,7 @@ requirements:
     - python
     - six
     - matplotlib
-    - numpy
+    - numpy ==1.12.1
     - pytest
     - jinja2
     - astropy
diff --git a/pkg_defs/ska3-flight/meta.yaml b/pkg_defs/ska3-flight/meta.yaml
index 95f85db8..351d1384 100644
--- a/pkg_defs/ska3-flight/meta.yaml
+++ b/pkg_defs/ska3-flight/meta.yaml
@@ -28,7 +28,7 @@ requirements:
     - jplephem ==2.8
     - kadi ==4.17
     - maude ==3.2
-    - mica ==3.18
+    - mica ==4.18
     - parse_cm ==3.5
     - proseco ==4.5
     - psmc_check ==v1.2.0