diff --git a/src/rad/resources/schemas/mosaic_basic-1.0.0.yaml b/src/rad/resources/schemas/mosaic_basic-1.0.0.yaml
index d3622741..bba9e16b 100644
--- a/src/rad/resources/schemas/mosaic_basic-1.0.0.yaml
+++ b/src/rad/resources/schemas/mosaic_basic-1.0.0.yaml
@@ -93,7 +93,7 @@ properties:
   program:
     title: Program number, defined range is 1..18445;
            included in obs_id and visit_id as 'PPPPP'.
-    type: string
+    type: integer
     sdf:
       special_processing: VALUE_REQUIRED
       source: