diff --git a/project.clj b/project.clj
index 31160c0..f16576f 100644
--- a/project.clj
+++ b/project.clj
@@ -3,7 +3,8 @@
   :url "https://github.com/weavejester/clj-aws-s3"
   :license {:name "Eclipse Public License"
             :url "http://www.eclipse.org/legal/epl-v10.html"}
-  :dependencies [[org.clojure/clojure "1.2.1"]
-                 [com.amazonaws/aws-java-sdk "1.7.5"]
+  :dependencies [[org.clojure/clojure "1.7.0"]
+                 [com.amazonaws/aws-java-sdk "1.7.5"
+                  :exclusions [joda-time]]
                  [clj-time "0.6.0"]]
   :plugins [[codox "0.8.10"]])
diff --git a/src/aws/sdk/s3.clj b/src/aws/sdk/s3.clj
index f9cc748..b90cdc4 100644
--- a/src/aws/sdk/s3.clj
+++ b/src/aws/sdk/s3.clj
@@ -442,6 +442,18 @@
     (s3-client cred)
     (map->ListObjectsRequest (merge {:bucket bucket} options)))))
 
+(defn key-seq
+  "Return a seq of keys matching a bucket and prefix."
+  [cred bucket prefix]
+  (let [step (fn step [marker]
+               (let [r (list-objects cred bucket
+                                     {:prefix prefix :marker marker})]
+                 (lazy-seq
+                  (cons (->> r :objects (map :key))
+                        (when (:truncated? r)
+                          (step (:next-marker r)))))))]
+    (concat (step nil))))
+
 (defn delete-object
   "Delete an object from an S3 bucket."
   [cred bucket key]