diff --git a/nextflow_schema.json b/nextflow_schema.json
index f0c63669..32ff3fe8 100644
--- a/nextflow_schema.json
+++ b/nextflow_schema.json
@@ -10,7 +10,7 @@
             "type": "object",
             "fa_icon": "fas fa-terminal",
             "description": "Define where the pipeline should find input data and save output data.",
-            "required": ["outdir"],
+            "required": ["input", "outdir"],
             "properties": {
                 "input": {
                     "type": "string",
@@ -173,9 +173,9 @@
                     "fa_icon": "fas fa-ban",
                     "hidden": true,
                     "help_text": "Do not load `igenomes.config` when running the pipeline. You may choose this option if you observe clashes between custom parameters and those supplied in `igenomes.config`."
-                },
-                "required": ["fasta"]
-            }
+                }
+            },
+            "required": ["fasta"]
         },
         "adapter_trimming_options": {
             "title": "Adapter trimming options",