diff --git a/src/utils.ts b/src/utils.ts
index 1f24c44..91f5363 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -98,7 +98,8 @@ export function digestAuthHeader(method: string, uri: string, wwwAuthenticate: s
   }
 
   let qop = opts.qop || '';
-  const [ user, pass ] = userpass.split(':');
+  const user = userpass.split(':', 1);
+  const pass = userpass.slice(user[0].length+1);
 
   let nc = String(++NC);
   nc = `${NC_PAD.substring(nc.length)}${nc}`;