diff --git a/src/rss_thread_watch/utils.clj b/src/rss_thread_watch/utils.clj
index 0de1280..0781220 100644
--- a/src/rss_thread_watch/utils.clj
+++ b/src/rss_thread_watch/utils.clj
@@ -68,3 +68,11 @@
                      (map? default-val)) ; If only one is, we don't care cus then it's just assigment
               {k (map-apply-defaults conf-val default-val)}
               {k (nil?-else conf-val default-val)})))))
+
+(defn fmap [f m]
+  "Applies function [f] to every key and value in map [m]
+   Function signature should be (f [key value])."
+  (into
+   (empty m)
+   (for [[key val] m]
+     [key (f key val)])))