2 files changed, 11 insertions, 1 deletions
diff --git a/lib/constants/__tests__/configSchema.js b/lib/constants/__tests__/configSchema.js
index 1541219..efc99b9 100644
--- a/lib/constants/__tests__/configSchema.js
+++ b/lib/constants/__tests__/configSchema.js
@@ -22,6 +22,16 @@ describe('configSchema', function() {
             expect(result.errors.length).toBe(0);
         });
 
+        it('should accept uppercase in filename', function() {
+            var result = validate({
+                structure: {
+                    readme: 'BOOK.adoc'
+                }
+            });
+
+            expect(result.errors.length).toBe(0);
+        });
+
         it('should not accept filepath', function() {
             var result = validate({
                 structure: {
diff --git a/lib/constants/configSchema.js b/lib/constants/configSchema.js
index 9a45bb3..e693977 100644
--- a/lib/constants/configSchema.js
+++ b/lib/constants/configSchema.js
@@ -1,4 +1,4 @@
-var FILENAME_REGEX = '^[a-z-._\d,\s]+$';
+var FILENAME_REGEX = '^[a-zA-Z-._\d,\s]+$';
 
 module.exports = {
     '$schema': 'http://json-schema.org/schema#',