diff --git a/pkgs/development/libraries/qt-5/5.15/srcs.nix b/pkgs/development/libraries/qt-5/5.15/srcs.nix
index 8c40a49ac0a7..ef625a7c763d 100644
--- a/pkgs/development/libraries/qt-5/5.15/srcs.nix
+++ b/pkgs/development/libraries/qt-5/5.15/srcs.nix
@@ -36,7 +36,7 @@ lib.mapAttrs mk (lib.importJSON ./srcs-generated.json)
 
   qtwebengine =
     let
-      branchName = "5.15.8";
+      branchName = "5.15.11";
       rev = "v${branchName}-lts";
     in
     {
@@ -44,11 +44,11 @@ lib.mapAttrs mk (lib.importJSON ./srcs-generated.json)
 
       src = fetchgit {
         url = "https://github.com/qt/qtwebengine.git";
-        sha256 = "04xhg5qpnxm8hzgkanml45za64c9i5pbxhki2l2wcq4b4y7f3hyr";
+        sha256 = "sha256-yrKPof18G10VjrwCn/4E/ywlpATJQZjvmVeM+9hLY0U=";
         inherit rev branchName;
         fetchSubmodules = true;
         leaveDotGit = true;
-        name = "qtwebengine-${lib.substring 0 7 rev}.tar.gz";
+        name = "qtwebengine-${lib.substring 0 8 rev}.tar.gz";
         postFetch = ''
           # remove submodule .git directory
           rm -rf "$out/src/3rdparty/.git"