diff --git a/src/typesense/api.clj b/src/typesense/api.clj
index ca25c98..8e9aa0d 100644
--- a/src/typesense/api.clj
+++ b/src/typesense/api.clj
@@ -48,8 +48,9 @@
 
 (defn- multi-search-uri
   "Returns the full multi-search uri resource path."
-  [uri common-search-parameters]
-  (str uri "/multi_search" (util/build-query common-search-parameters)))
+  [uri common-search-params opt-query-params]
+  (let [query-parameter-map (merge common-search-params opt-query-params)]
+    (str uri "/multi_search" (util/build-query query-parameter-map))))
 
 (defn create-collection-req
   [{:keys [uri key]} schema]
@@ -136,8 +137,8 @@
    :req {:headers {api-key-header-name key}}})
 
 (defn multi-search-req
-  [{:keys [uri key]} search-reqs common-search-params]
-  {:uri (multi-search-uri uri common-search-params)
+  [{:keys [uri key]} search-reqs common-search-params opt-query-params]
+  {:uri (multi-search-uri uri common-search-params opt-query-params)
    :req {:headers {api-key-header-name key
                    "Content-Type" "application/json"}
          :body (json/write-str search-reqs)}})
diff --git a/src/typesense/client.clj b/src/typesense/client.clj
index 6427a8e..801be4e 100644
--- a/src/typesense/client.clj
+++ b/src/typesense/client.clj
@@ -161,9 +161,9 @@
 
 (defn multi-search
   "Search for documents in multiple collections."
-  [settings search-reqs common-search-params]
+  [settings search-reqs common-search-params & opt-query-params]
   (try+
-   (let [{:keys [uri req]} (api/multi-search-req settings search-reqs common-search-params)]
+   (let [{:keys [uri req]} (api/multi-search-req settings search-reqs common-search-params opt-query-params)]
      (util/http-response-json->map (http/post uri req)))
    (catch [:type :clj-http.client/unexceptional-status] e
      (throw (http-ex-data->typesense-ex-info e)))))
diff --git a/test/typesense/api_test.clj b/test/typesense/api_test.clj
index 29973ae..d48e172 100644
--- a/test/typesense/api_test.clj
+++ b/test/typesense/api_test.clj
@@ -165,13 +165,29 @@
                                                :filter_by "price:=[50..120]"}
                                               {:collection "brands"
                                                :q "Nike"}]}
-                                  {:query_by "name"})
+                                  {:query_by "name"}
+                                  nil)
         exp {:uri "http://localhost:8108/multi_search?query_by=name"
              :req {:headers {"X-TYPESENSE-API-KEY" "key"
                              "Content-Type" "application/json"}
                    :body "{\"searches\":[{\"collection\":\"products\",\"q\":\"shoe\",\"filter_by\":\"price:=[50..120]\"},{\"collection\":\"brands\",\"q\":\"Nike\"}]}"}}]
     (is (= exp req))))
 
+(deftest multi-search-req-test-optional-parameter
+  (let [req (sut/multi-search-req settings
+                                  {:searches [{:collection "products"
+                                               :q "shoe"
+                                               :filter_by "price:=[50..120]"}
+                                              {:collection "brands"
+                                               :q "Nike"}]}
+                                  {:query_by "name"}
+                                  {:limit_multi_searches 100})
+        exp {:uri "http://localhost:8108/multi_search?query_by=name&limit_multi_searches=100"
+             :req {:headers {"X-TYPESENSE-API-KEY" "key"
+                             "Content-Type" "application/json"}
+                   :body "{\"searches\":[{\"collection\":\"products\",\"q\":\"shoe\",\"filter_by\":\"price:=[50..120]\"},{\"collection\":\"brands\",\"q\":\"Nike\"}]}"}}]
+    (is (= exp req))))
+
 (deftest create-api-key-req-test
   (let [req (sut/create-api-key-req settings
                                     {:description "Search only companies key."