diff --git a/data/schemas/samplesheet.json b/data/schemas/samplesheet.json
index 0ab3500890bd971733d76411de9a2d342f745f23..744493565abbb55414b6088bf812681d555818df 100644
--- a/data/schemas/samplesheet.json
+++ b/data/schemas/samplesheet.json
@@ -101,7 +101,8 @@
     },
     "required": [
       "sampleset",
-      "chrom"
+      "chrom",
+      "pgen"
     ],
     "dependentRequired": {
       "pgen": [
@@ -126,4 +127,4 @@
       ]
     }
   }
-}
\ No newline at end of file
+}