diff --git a/.gitignore b/.gitignore
index 4f2bad6..feb8c6c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ aerospike-clj.iml
 /.lein-failures
 target
 .nrepl-port
+.lsp
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01c8cb0..950ea34 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+#### VERSION 0.6.0
+* Support ClientEvents vector to be a vector of completions instead of a single one.
+* Bump aerospike lib to 4.4.15
+
 #### VERSION 0.5.1
 * Added batch-exsits
 * Bump aerospike lib to 4.4.10
diff --git a/project.clj b/project.clj
index bc8fd8f..5b52fd3 100644
--- a/project.clj
+++ b/project.clj
@@ -1,9 +1,9 @@
-(defproject aerospike-clj "0.5.5"
+(defproject aerospike-clj "0.6.0"
   :description "An Aerospike Clojure client."
   :url "https://github.com/AppsFlyer/aerospike-clj"
   :license {:name "Eclipse Public License"
             :url "http://www.eclipse.org/legal/epl-v10.html"}
-  :dependencies [[com.aerospike/aerospike-client "4.4.10"]
+  :dependencies [[com.aerospike/aerospike-client "4.4.15"]
                  [manifold "0.1.8"]]
   :plugins [[lein-codox "0.10.5"]]
   :codox {:output-path "codox"
@@ -12,9 +12,9 @@
   :profiles {:dev {:plugins [[jonase/eastwood "0.3.5"]
                              [lein-cloverage "1.1.1"]]
                    :dependencies [[org.clojure/clojure "1.10.1"]
-                                  [criterium "0.4.5"]
+                                  [criterium "0.4.6"]
                                   [cheshire "5.10.0"]
                                   [com.taoensso/timbre "4.10.0"]
                                   [danlentz/clj-uuid "0.1.9"]
-                                  [com.fasterxml.jackson.core/jackson-databind "2.10.2"]]
+                                  [com.fasterxml.jackson.core/jackson-databind "2.11.1"]]
                    :global-vars {*warn-on-reflection* true}}})
diff --git a/src/aerospike_clj/client.clj b/src/aerospike_clj/client.clj
index bf34c07..635f8bd 100644
--- a/src/aerospike_clj/client.clj
+++ b/src/aerospike_clj/client.clj
@@ -62,7 +62,8 @@
   :client-policy - a ready ClientPolicy
   \"username\"
   :port (default is 3000)
-  :client-events an implementation of ClientEvents"
+  :client-events an implementation of ClientEvents. Either a single one or a vector
+  thereof. In the case of a vector, the client will chain the instances by order."
   ([hosts aero-ns]
    (init-simple-aerospike-client hosts aero-ns {}))
   ([hosts aero-ns conf]
@@ -74,7 +75,7 @@
                                   :el event-loops
                                   :dbns aero-ns
                                   :cluster-name cluster-name
-                                  :client-events (:client-events conf)}))))
+                                  :client-events (utils/vectorize (:client-events conf))}))))
 
 (defn stop-aerospike-client
   "gracefully stop a client, waiting until all async operations finish."
@@ -95,13 +96,13 @@
               "A continuation function. Registered on the operation future and called when operations fails."))
 
 (defn- register-events [op-future db op-name index op-start-time]
-  (if-let [client-events (:client-events db)]
+  (doseq [ce (:client-events db)]
     (-> op-future
         (d/chain' (fn [op-result]
-                    (on-success client-events op-name op-result    index op-start-time db)))
+                    (on-success ce op-name op-result    index op-start-time db)))
         (d/catch' (fn [op-exception]
-                    (on-failure client-events op-name op-exception index op-start-time db))))
-    op-future))
+                    (on-failure ce op-name op-exception index op-start-time db)))))
+  op-future)
 
 (defn- ^ExistsListener reify-exists-listener [op-future]
   (reify ExistsListener
diff --git a/src/aerospike_clj/utils.clj b/src/aerospike_clj/utils.clj
index cc72661..c942cd3 100644
--- a/src/aerospike_clj/utils.clj
+++ b/src/aerospike_clj/utils.clj
@@ -60,3 +60,13 @@
   "An optimized way to convert vectors into Java arrays of type `cls`"
   [cls v]
   (.toArray ^Collection v ^"[Ljava.lang.Object;" (make-array cls (count v))))
+
+(defn vectorize 
+  "convert a single value to a vector or any collection to the equivalent vector.
+  NOTE: a map or a set have no defined order so vectorize them is not allowed"
+  [v]
+  (cond
+    (or (map? v) (set? v)) (throw (IllegalArgumentException. "undefined sequence order for argument"))
+    (or (nil? v) (vector? v) (seq? v)) (vec v)
+    :else [v]))
+  
diff --git a/test/aerospike_clj/utils_test.clj b/test/aerospike_clj/utils_test.clj
new file mode 100644
index 0000000..c8554f6
--- /dev/null
+++ b/test/aerospike_clj/utils_test.clj
@@ -0,0 +1,11 @@
+(ns aerospike-clj.utils-test
+  (:require [clojure.test :refer [deftest is]]
+            [aerospike-clj.utils :as utils]))
+  
+(deftest vectorize
+  (is (= [1] (utils/vectorize 1)))
+  (is (= [] (utils/vectorize nil)))
+  (is (= [1 2 3] (utils/vectorize '(1 2 3))))
+  (is (= [1 2 3] (utils/vectorize [1 2 3])))
+  (is (thrown? IllegalArgumentException (utils/vectorize #{1 2 3})))
+  (is (thrown? IllegalArgumentException (utils/vectorize {1 2}))))