diff --git a/src/assistantSdk/assistant.ts b/src/assistantSdk/assistant.ts
index de3993cce9..efa318c2b6 100644
--- a/src/assistantSdk/assistant.ts
+++ b/src/assistantSdk/assistant.ts
@@ -70,7 +70,7 @@ const promiseTimeout = <T>(promise: Promise<T>, timeout: number): Promise<T> =>
     return Promise.race([
         promise.then((v) => {
             if (timeoutId) {
-                window.clearTimeout(timeoutId);
+                clearTimeout(timeoutId);
             }
             return v;
         }),
@@ -405,7 +405,7 @@ export const createAssistant = ({
                         const { command } = items[i];
 
                         if (typeof command !== 'undefined') {
-                            window.setTimeout(() => emit('command', command));
+                            setTimeout(() => emit('command', command));
 
                             if (command.type === 'start_music_recognition') {
                                 voice.shazam();
diff --git a/src/assistantSdk/client/protocol.ts b/src/assistantSdk/client/protocol.ts
index 0eea4494c5..188b7e398c 100644
--- a/src/assistantSdk/client/protocol.ts
+++ b/src/assistantSdk/client/protocol.ts
@@ -275,7 +275,7 @@ export const createProtocol = (
 
             status = 'connected';
 
-            window.clearTimeout(clearReadyTimer);
+            clearTimeout(clearReadyTimer);
 
             /// считаем коннект = ready, если по истечении таймаута сокет не был разорван
             /// т.к бек может разрывать сокет, если с settings что-то не так
@@ -343,7 +343,10 @@ export const createProtocol = (
         },
         init: () => {
             // в отличии от reconnect не обрывает коннект если он в порядке
-            if (status === 'ready' && window.navigator.onLine) {
+            if (
+                (status === 'ready' && typeof window !== 'undefined' && window.navigator.onLine) ||
+                typeof window === 'undefined'
+            ) {
                 return Promise.resolve();
             }
 
diff --git a/src/assistantSdk/client/transport.ts b/src/assistantSdk/client/transport.ts
index 7d545dcbae..95a626b33b 100644
--- a/src/assistantSdk/client/transport.ts
+++ b/src/assistantSdk/client/transport.ts
@@ -16,19 +16,24 @@ export const createTransport = ({ createWS = defaultWSCreator, checkCertUrl }: C
     const { on, emit } = createNanoEvents<TransportEvents>();
 
     let hasCert = !checkCertUrl;
-    let retryTimeoutId = -1;
+    let retryTimeoutId: unknown = -1;
     let retries = 0;
     let status: 'closed' | 'closing' | 'connecting' | 'open' = 'closed';
     let webSocket: WebSocket;
     let stopped = true;
 
-    const checkCert = (checkUrl: string) =>
-        new Promise<boolean>((resolve) => {
+    const checkCert = (checkUrl: string) => {
+        if (typeof window === 'undefined') {
+            return Promise.resolve(true);
+        }
+
+        return new Promise<boolean>((resolve) => {
             window
                 .fetch(checkUrl)
                 .then(() => resolve(true))
                 .catch(() => resolve(false));
         });
+    };
 
     const close = () => {
         stopped = true;
@@ -46,7 +51,7 @@ export const createTransport = ({ createWS = defaultWSCreator, checkCertUrl }: C
         status = 'connecting';
         emit('connecting');
 
-        if (!hasCert && window.navigator.onLine) {
+        if ((!hasCert && typeof window !== 'undefined' && window.navigator.onLine) || typeof window === 'undefined') {
             const okay = await checkCert(checkCertUrl!);
 
             if (!okay) {
@@ -70,7 +75,7 @@ export const createTransport = ({ createWS = defaultWSCreator, checkCertUrl }: C
                 return;
             }
 
-            window.clearTimeout(retryTimeoutId);
+            clearTimeout(retryTimeoutId as number);
 
             retries = 0;
 
@@ -90,10 +95,10 @@ export const createTransport = ({ createWS = defaultWSCreator, checkCertUrl }: C
 
             // пробуем переподключаться, если возникла ошибка при коннекте
             if (!webSocket || (webSocket.readyState === 3 && !stopped)) {
-                window.clearTimeout(retryTimeoutId);
+                clearTimeout(retryTimeoutId as number);
 
                 if (retries < 2) {
-                    retryTimeoutId = window.setTimeout(() => {
+                    retryTimeoutId = setTimeout(() => {
                         // eslint-disable-next-line @typescript-eslint/no-use-before-define
                         open(url);
 
@@ -129,7 +134,7 @@ export const createTransport = ({ createWS = defaultWSCreator, checkCertUrl }: C
             return;
         }
 
-        window.setTimeout(() => reconnect(url));
+        setTimeout(() => reconnect(url));
 
         close();
     };
@@ -141,7 +146,7 @@ export const createTransport = ({ createWS = defaultWSCreator, checkCertUrl }: C
     return {
         close,
         get isOnline() {
-            return window.navigator.onLine;
+            return (typeof window !== 'undefined' && window.navigator.onLine) || typeof window === 'undefined';
         },
         on,
         open,
diff --git a/src/assistantSdk/voice/audioContext.ts b/src/assistantSdk/voice/audioContext.ts
index 0c6fb93c1d..13f326e93c 100644
--- a/src/assistantSdk/voice/audioContext.ts
+++ b/src/assistantSdk/voice/audioContext.ts
@@ -8,16 +8,17 @@ export const isAudioSupported = typeof window !== 'undefined' && (window.AudioCo
  * @returns AudioContext
  */
 export const createAudioContext = (options?: AudioContextOptions): AudioContext => {
-    if (window.AudioContext) {
-        return new AudioContext(options);
+    if (!isAudioSupported) {
+        throw new Error('Audio not supported');
     }
 
-    if (window.webkitAudioContext) {
-        // eslint-disable-next-line new-cap
-        return new window.webkitAudioContext();
+    if (window.AudioContext) {
+        return new AudioContext(options);
     }
 
-    throw new Error('Audio not supported');
+    // @ts-ignore
+    // eslint-disable-next-line new-cap
+    return new window.webkitAudioContext();
 };
 
 interface ContextEvents {
diff --git a/src/assistantSdk/voice/listener/navigatorAudioProvider.ts b/src/assistantSdk/voice/listener/navigatorAudioProvider.ts
index c2c08303ea..a825fe5ad1 100644
--- a/src/assistantSdk/voice/listener/navigatorAudioProvider.ts
+++ b/src/assistantSdk/voice/listener/navigatorAudioProvider.ts
@@ -132,7 +132,7 @@ export const createNavigatorAudioProvider = (cb: (buffer: ArrayBuffer, last: boo
             return createAudioRecorder(stream, cb);
         })
         .catch((err) => {
-            if (window.location.protocol === 'http:') {
+            if (typeof window !== 'undefined' && window.location.protocol === 'http:') {
                 throw new Error('Audio is supported only on a secure connection');
             }