diff --git a/README.md b/README.md
index 94ccfda..7f8c8da 100644
--- a/README.md
+++ b/README.md
@@ -581,7 +581,7 @@ Since mount is a _library_ it should _not_ bring any dependencies unless its fun
 
 > But I still these logging statements in the examples.
 
-The way this is done is via an excellent [robert hooke](https://github.com/technomancy/robert-hooke/). Example applications live in `test`, so does the [utility](https://github.com/tolitius/mount/blob/75d7cdc610ce38623d4d3aea1da3170d1c9a3b4b/test/app/utils/logging.clj#L44) that adds logging to all the mount's lifecycle functions on start in [dev.clj](https://github.com/tolitius/mount/blob/75d7cdc610ce38623d4d3aea1da3170d1c9a3b4b/dev/dev.clj#L21).
+The way this is done is via an excellent [robert hooke](https://github.com/technomancy/robert-hooke/). Example applications live in `test`, so does the [utility](test/clj/tapp/utils/logging.clj#L42) that adds logging to all the mount's lifecycle functions on start in [dev.clj](https://github.com/tolitius/mount/blob/75d7cdc610ce38623d4d3aea1da3170d1c9a3b4b/dev/dev.clj#L21).
 
 ## Clojure Version
 
diff --git a/build.boot b/build.boot
index 9a973eb..fa9db02 100644
--- a/build.boot
+++ b/build.boot
@@ -1,4 +1,4 @@
-(def +version+ "0.1.10")
+(def +version+ "0.1.11-SNAPSHOT")
 
 (set-env!
   :source-paths #{"src"}
diff --git a/src/mount/core.cljc b/src/mount/core.cljc
index 1917961..4973067 100644
--- a/src/mount/core.cljc
+++ b/src/mount/core.cljc
@@ -312,16 +312,18 @@
 
   (add-watcher [_ ks state]
     (doseq [k ks]
-      (swap! watchers update k #(conj % state))))
+      (swap! watchers update k (fn [v]
+                                 (-> (conj v state) vec)))))
 
-  (on-change [_ k]
-    (let [states (@watchers k)]
-      (apply stop states)
-      (apply start states))))
+  (on-change [_ ks]
+    (doseq [k ks]
+      (when-let [states (seq (@watchers k))]
+        (apply stop states)
+        (apply start states)))))
 
-(defn restart-listner
+(defn restart-listener
   ([]
-   (restart-listner {}))
+   (restart-listener {}))
   ([watchers]
    (RestartListener. (atom watchers))))