diff --git a/packages/grpcweb-transport/src/grpc-web-format.ts b/packages/grpcweb-transport/src/grpc-web-format.ts
index f0dfee66..b435e3e6 100644
--- a/packages/grpcweb-transport/src/grpc-web-format.ts
+++ b/packages/grpcweb-transport/src/grpc-web-format.ts
@@ -300,9 +300,11 @@ function parseMetadata(headers: HttpHeaders): RpcMetadata {
 function parseTrailer(trailerData: Uint8Array): HttpHeaders {
     let headers: HttpHeaders = {};
     for (let chunk of String.fromCharCode.apply(String, trailerData as unknown as number[]).trim().split("\r\n")) {
-        let [key, value] = chunk.split(":", 2);
+        if (chunk == "")
+            continue;
+        let [key, ...val] = chunk.split(":");
+        const value = val.join(":").trim();
         key = key.trim();
-        value = value.trim();
         let e = headers[key];
         if (typeof e == "string")
             headers[key] = [e, value];