diff --git a/httpbin/filters.py b/httpbin/filters.py
index 021d32d..9dc272a 100644
--- a/httpbin/filters.py
+++ b/httpbin/filters.py
@@ -43,12 +43,11 @@ def json(f, *args, **kwargs):
     if isinstance(data, Response):
         return data
 
-    dump = omnijson.dumps(data)
+    dump = omnijson.dumps(data, indent=3)
 
     r = app.make_response(dump)
     r.headers['Content-Type'] = 'application/json'
 
-
     return r
 
 
diff --git a/reqs.txt b/reqs.txt
index c759b66..153a128 100644
--- a/reqs.txt
+++ b/reqs.txt
@@ -6,4 +6,4 @@ argparse==1.2.1
 distribute==0.6.15
 wsgiref==0.1.2
 decorator==3.3.1
-omnijson
+omnijson==0.1.1
\ No newline at end of file