diff --git a/README.md b/README.md
index a560361..d4405c7 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,7 @@ export interface Cookie {
   expires?: string;
   secure?: boolean;
   httpOnly?: boolean;
+  sameSite?: string;
 }
 
 export interface Cookies {
diff --git a/android/src/main/java/com/reactnativecommunity/cookies/CookieManagerModule.java b/android/src/main/java/com/reactnativecommunity/cookies/CookieManagerModule.java
index f526d03..73d3be7 100644
--- a/android/src/main/java/com/reactnativecommunity/cookies/CookieManagerModule.java
+++ b/android/src/main/java/com/reactnativecommunity/cookies/CookieManagerModule.java
@@ -68,7 +68,8 @@ public String getName() {
     public void set(String url, ReadableMap cookie, Boolean useWebKit, final Promise promise) {
         String cookieString = null;
         try {
-            cookieString = toRFC6265string(makeHTTPCookieObject(url, cookie));
+            String sameSite = cookie.getString("sameSite");
+            cookieString = toRFC6265string(makeHTTPCookieObject(url, cookie), sameSite);
         } catch (Exception e) {
             promise.reject(e);
             return;
@@ -301,7 +302,7 @@ private WritableMap createCookieData(HttpCookie cookie) {
      * For our purposes RFC 6265 is the right way to go.
      * This is a convenience method to give us the right formatting.
      */
-    private String toRFC6265string(HttpCookie cookie) {
+    private String toRFC6265string(HttpCookie cookie, String sameSite) {
         StringBuilder builder = new StringBuilder();
 
         builder.append(cookie.getName())
@@ -336,6 +337,10 @@ private String toRFC6265string(HttpCookie cookie) {
             builder.append("; httponly");
         }
 
+        if (sameSite != null) {
+            builder.append("; samesite=").append(sameSite);
+        }
+
         return builder.toString();
     }
 
diff --git a/index.d.ts b/index.d.ts
index b2977de..06701f7 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -8,6 +8,7 @@ declare module '@react-native-cookies/cookies' {
     expires?: string;
     secure?: boolean;
     httpOnly?: boolean;
+    sameSite?: string;
   }
 
   export interface Cookies {
diff --git a/ios/RNCookieManagerIOS/RNCookieManagerIOS.m b/ios/RNCookieManagerIOS/RNCookieManagerIOS.m
index 0e76dba..277bed4 100644
--- a/ios/RNCookieManagerIOS/RNCookieManagerIOS.m
+++ b/ios/RNCookieManagerIOS/RNCookieManagerIOS.m
@@ -273,6 +273,7 @@ -(NSHTTPCookie *)makeHTTPCookieObject:(NSURL *)url
     NSDate *expires = [RCTConvert NSDate:props[@"expires"]];
     NSNumber *secure = [RCTConvert NSNumber:props[@"secure"]];
     NSNumber *httpOnly = [RCTConvert NSNumber:props[@"httpOnly"]];
+    NSNumber *sameSite = [RCTConvert NSString:props[@"sameSite"]];
 
     NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];
     [cookieProperties setObject:name forKey:NSHTTPCookieName];
@@ -315,6 +316,9 @@ -(NSHTTPCookie *)makeHTTPCookieObject:(NSURL *)url
     if ([httpOnly boolValue]) {
         [cookieProperties setObject:httpOnly forKey:@"HttpOnly"];
     }
+    if (!isEmpty(sameSite)) {
+        [cookieProperties setObject:sameSite forKey:@"SameSite"];
+    }
 
     NSHTTPCookie *cookie = [NSHTTPCookie cookieWithProperties:cookieProperties];
 
@@ -328,6 +332,9 @@ -(NSDictionary *)createCookieData:(NSHTTPCookie *)cookie
     [cookieData setObject:cookie.value forKey:@"value"];
     [cookieData setObject:cookie.path forKey:@"path"];
     [cookieData setObject:cookie.domain forKey:@"domain"];
+    if (!isEmpty(cookie.sameSitePolicy)) {
+		[cookieData setObject:cookie.sameSitePolicy forKey:@"sameSite"];
+	}
     [cookieData setObject:[NSString stringWithFormat:@"%@", @(cookie.version)] forKey:@"version"];
     if (!isEmpty(cookie.expiresDate)) {
         [cookieData setObject:[self.formatter stringFromDate:cookie.expiresDate] forKey:@"expires"];