diff --git a/src/search.lisp b/src/search.lisp
index a71de19..51a8d21 100644
--- a/src/search.lisp
+++ b/src/search.lisp
@@ -37,7 +37,8 @@ Note: The JSON object to encoded as a string."
       ("relative-path"  . ,relative-path-value)
       ("thumbnail-path" . ,thumbnail-path-value)
       ("year"           . ,(local-time:timestamp-year created-at-value))
-      ("month"          . ,(local-time:timestamp-month created-at-value))
+      ("month"          . ,(utils:month-number-to-name
+                            (local-time:timestamp-month created-at-value)))
       ("day"            . ,(local-time:timestamp-day created-at-value))
       ("keywords"       . ,(cl-ppcre:split "," keywords-value))))))