diff --git a/lib/__tests__/_sendEvent.test.ts b/lib/__tests__/_sendEvent.test.ts
index 9caa77e3..a8fc1a15 100644
--- a/lib/__tests__/_sendEvent.test.ts
+++ b/lib/__tests__/_sendEvent.test.ts
@@ -389,7 +389,27 @@ describe("sendEvents", () => {
       expect(payload).toEqual({
         events: [
           expect.objectContaining({
-            filters: ["brand:Apple"]
+            filters: ["brand%3AApple"]
+          })
+        ]
+      });
+    });
+
+    it("should uri-encodes filters", () => {
+      (analyticsInstance as any).sendEvents([
+        {
+          eventType: "click",
+          eventName: "my-event",
+          index: "my-index",
+          filters: ["brand:Cool Brand"]
+        }
+      ]);
+      expect(XMLHttpRequest.send).toHaveBeenCalledTimes(1);
+      const payload = JSON.parse(XMLHttpRequest.send.mock.calls[0][0]);
+      expect(payload).toEqual({
+        events: [
+          expect.objectContaining({
+            filters: ["brand%3ACool%20Brand"]
           })
         ]
       });
diff --git a/lib/_sendEvent.ts b/lib/_sendEvent.ts
index 72e8d6d2..ab187248 100644
--- a/lib/_sendEvent.ts
+++ b/lib/_sendEvent.ts
@@ -1,5 +1,6 @@
 import { RequestFnType } from "./utils/request";
-import { InsightsEvent } from "./types";
+import { InsightsEvent } from './types'
+import { isUndefined } from "./utils";
 
 export function makeSendEvents(requestFn: RequestFnType) {
   return function sendEvents(
@@ -14,10 +15,17 @@ export function makeSendEvents(requestFn: RequestFnType) {
       );
     }
 
-    const events: InsightsEvent[] = eventData.map(data => ({
-      ...data,
-      userToken: data?.userToken ?? this._userToken
-    }))
+    const events: InsightsEvent[] = eventData.map(data => {
+      const {filters, ...rest}  = data;
+      const payload: InsightsEvent = {
+        ...rest,
+        userToken: data?.userToken ?? this._userToken
+      };
+      if (!isUndefined(filters)) {
+        payload.filters = filters.map(encodeURIComponent)
+      }
+      return payload;
+    })
 
     return sendRequest(
       requestFn,
diff --git a/package.json b/package.json
index b0ba3e23..a3993783 100644
--- a/package.json
+++ b/package.json
@@ -128,7 +128,7 @@
   "bundlesize": [
     {
       "path": "./dist/search-insights.min.js",
-      "maxSize": "2.4 kB"
+      "maxSize": "2.75 kB"
     }
   ]
 }