diff --git a/CHANGELOG.md b/CHANGELOG.md
index c1770e71..8b9b04d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [0.6.7] - [2019-07-24]
+
+### Fixed
+
+ * Supply `key-serde` as well as `value-serde` in `aggregate` methods
+
 ## [0.6.6] - [2019-06-20]
 
 ### Added
diff --git a/src/jackdaw/streams/interop.clj b/src/jackdaw/streams/interop.clj
index 7e26c348..f4de565e 100644
--- a/src/jackdaw/streams/interop.clj
+++ b/src/jackdaw/streams/interop.clj
@@ -430,14 +430,13 @@
 (deftype CljKGroupedTable [^KGroupedTable kgroupedtable]
   IKGroupedBase
   (aggregate
-    [_ initializer-fn adder-fn subtractor-fn
-     {:keys [topic-name value-serde]}]
+    [_ initializer-fn adder-fn subtractor-fn topic]
     (clj-ktable
      (.aggregate ^KGroupedTable kgroupedtable
                  ^Initializer (initializer initializer-fn)
                  ^Aggregator (aggregator adder-fn)
                  ^Aggregator (aggregator subtractor-fn)
-                 (doto (Materialized/as ^String topic-name) (.withValueSerde value-serde)))))
+                 ^Materialized (topic->materialized topic))))
 
   (aggregate
     [_ initializer-fn adder-fn subtractor-fn]
@@ -486,12 +485,12 @@
 (deftype CljKGroupedStream [^KGroupedStream kgroupedstream]
   IKGroupedBase
   (aggregate
-    [_ initializer-fn aggregator-fn {:keys [topic-name value-serde]}]
+    [_ initializer-fn aggregator-fn topic]
     (clj-ktable
      (.aggregate ^KGroupedStream kgroupedstream
                  ^Initializer (initializer initializer-fn)
                  ^Aggregator (aggregator aggregator-fn)
-                 (doto (Materialized/as ^String topic-name) (.withValueSerde value-serde)))))
+                 ^Materialized (topic->materialized topic))))
 
   (aggregate
     [_ initializer-fn aggregator-fn]
@@ -547,12 +546,12 @@
 (deftype CljTimeWindowedKStream [^TimeWindowedKStream windowed-kstream]
   IKGroupedBase
   (aggregate
-    [_ initializer-fn aggregator-fn {:keys [topic-name value-serde]}]
+    [_ initializer-fn aggregator-fn topic]
     (clj-ktable
      (.aggregate ^TimeWindowedKStream windowed-kstream
                  ^Initializer (initializer initializer-fn)
                  ^Aggregator (aggregator aggregator-fn)
-                 (doto (Materialized/as ^String topic-name) (.withValueSerde value-serde)))))
+                 ^Materialized (topic->materialized topic))))
 
   (count
     [_]
@@ -585,13 +584,13 @@
 (deftype CljSessionWindowedKStream [^SessionWindowedKStream windowed-kstream]
   IKGroupedBase
   (aggregate
-    [_ initializer-fn aggregator-fn merger-fn {:keys [topic-name value-serde]}]
+    [_ initializer-fn aggregator-fn merger-fn topic]
     (clj-ktable
      (.aggregate ^SessionWindowedKStream windowed-kstream
                  ^Initializer (initializer initializer-fn)
                  ^Aggregator (aggregator aggregator-fn)
                  ^Merger (merger merger-fn)
-                 (doto (Materialized/as ^String topic-name) (.withValueSerde value-serde)))))
+                 ^Materialized (topic->materialized topic))))
 
   (count
     [_]
diff --git a/test/jackdaw/streams_test.clj b/test/jackdaw/streams_test.clj
index f4042b68..e94247f9 100644
--- a/test/jackdaw/streams_test.clj
+++ b/test/jackdaw/streams_test.clj
@@ -3,6 +3,7 @@
   (:require [clojure.spec.test.alpha :as stest]
             [clojure.string :as string]
             [clojure.test :refer :all]
+            [jackdaw.serdes.edn :as jse]
             [jackdaw.streams :as k]
             [jackdaw.streams.configurable :as cfg]
             [jackdaw.streams.lambdas :as lambdas :refer [key-value]]
@@ -734,6 +735,33 @@
         (is (= [0 -7] (second keyvals)))
         (is (= [1 -8] (nth keyvals 2))))))
 
+  (testing "aggregate: explicit kv store with custom serdes"
+    (let [serdes {:key-serde (jse/serde)
+                  :value-serde (jse/serde)}
+          topic-a (merge (mock/topic "topic-a") serdes)
+          topic-b (merge (mock/topic "topic-b") serdes)
+          driver (mock/build-driver (fn [builder]
+                                      (-> builder
+                                          (k/kstream topic-a)
+                                          (k/group-by (fn [[_k v]] (:uuid v)) topic-a)
+                                          (k/aggregate (constantly 0)
+                                                       (fn [acc [_k v]] (+ acc (:i v)))
+                                                       topic-a)
+                                          (k/to-kstream)
+                                          (k/to topic-b))))
+          publish (partial mock/publish driver topic-a)
+          uuid-a #uuid "a8e310d7-f0d6-4f81-a474-aab5d6234149"
+          uuid-b #uuid "0fb9ad92-dad8-45e7-9a87-7dcd9783076e"]
+
+      (publish uuid-a {:uuid uuid-a :i 1})
+      (publish uuid-b {:uuid uuid-a :i 3})
+      (publish uuid-b {:uuid uuid-b :i 5})
+
+      (let [keyvals (mock/get-keyvals driver topic-b)]
+        (is (= [uuid-a 1] (nth keyvals 0)))
+        (is (= [uuid-a 4] (nth keyvals 1)))
+        (is (= [uuid-b 5] (nth keyvals 2))))))
+
   (testing "aggregate: implicit kv store"
     (let [topic-a (mock/topic "topic-a")
           topic-b (mock/topic "topic-b")
@@ -898,6 +926,34 @@
             (is (= [0 1] (nth keyvals 2)))
             (is (= [1 3] (nth keyvals 3))))))))
 
+  (testing "aggregate: explicit kv store with custom serdes"
+    (let [serdes {:key-serde (jse/serde)
+                  :value-serde (jse/serde)}
+          topic-a (merge (mock/topic "topic-a") serdes)
+          topic-b (merge (mock/topic "topic-b") serdes)
+          driver (mock/build-driver (fn [builder]
+                                      (-> (k/ktable builder topic-a)
+                                          (k/group-by (fn [[_k v]] [(:uuid v) v]) topic-a)
+                                          (k/aggregate (constantly 0)
+                                                       (fn [acc [_k v]] (+ acc (:i v)))
+                                                       (fn [acc [_k v]] (- acc (:i v)))
+                                                       topic-b)
+                                          (k/to-kstream)
+                                          (k/to topic-b))))
+          publish (partial mock/publish driver topic-a)
+          uuid-a #uuid "a8e310d7-f0d6-4f81-a474-aab5d6234149"
+          uuid-b #uuid "0fb9ad92-dad8-45e7-9a87-7dcd9783076e"]
+
+      (publish uuid-a {:uuid uuid-a :i 1})
+      (publish uuid-b {:uuid uuid-a :i 3})
+      (publish uuid-b {:uuid uuid-b :i 5})
+
+      (let [keyvals (mock/get-keyvals driver topic-b)]
+        (is (= [uuid-a 1] (nth keyvals 0)))
+        (is (= [uuid-a 4] (nth keyvals 1)))
+        (is (= [uuid-a 1] (nth keyvals 2)))
+        (is (= [uuid-b 5] (nth keyvals 3))))))
+
   (testing "aggregate: implicit kv store"
     (let [topic-a (mock/topic "topic-a")
           topic-b (mock/topic "topic-b")]