diff --git a/pygeoapi/api.py b/pygeoapi/api.py
index 22f9919..1ccd065 100644
--- a/pygeoapi/api.py
+++ b/pygeoapi/api.py
@@ -492,7 +492,7 @@ class API(object):
         except AttributeError:
             bbox = []
         try:
-            [float(c) for c in bbox]
+            bbox = [float(c) for c in bbox]
         except ValueError:
             exception = {
                 'code': 'InvalidParameterValue',