diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e5db47..ba852a5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,8 +4,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [unreleased]
+## [v0.1.1]
 ### Fixed
+- Reference not being required by the schema.
 - Bug in documentation that prevented blog post from building.
 
 ## [v0.1.0]
diff --git a/nextflow.config b/nextflow.config
index b6eb7a2..696c9e8 100644
--- a/nextflow.config
+++ b/nextflow.config
@@ -64,7 +64,7 @@ manifest {
     description     = 'Amplicon workflow'
     mainScript      = 'main.nf'
     nextflowVersion = '>=20.10.0'
-    version         = 'v0.1.0'
+    version         = 'v0.1.1'
 }
 
 executor {
diff --git a/nextflow_schema.json b/nextflow_schema.json
index e17fd78..40785d0 100644
--- a/nextflow_schema.json
+++ b/nextflow_schema.json
@@ -29,11 +29,12 @@
                     "type": "string",
                     "format": "file-path",
                     "description": "Path to a reference FASTA file.",
-                    "help_text": "If provided, the workflow will perform variant calling against the reference. Otherwise, it will cluster reads and create the consensus sequence for each cluster. The reference file should contain one ref. sequence per amplicon."
+                    "help_text": "The reference file should contain one sequence per amplicon."
                 }
             },
             "required": [
-                "fastq"
+                "fastq",
+                "reference"
             ]
         },
         "samples": {