diff --git a/srcpkgs/qt5-webengine/patches/0200-invalidate-old-v8-cache.patch b/srcpkgs/qt5-webengine/patches/0200-invalidate-old-v8-cache.patch
new file mode 100644
index 00000000000..0b3820466dc
--- /dev/null
+++ b/srcpkgs/qt5-webengine/patches/0200-invalidate-old-v8-cache.patch
@@ -0,0 +1,31 @@
+From 12ecfd11e326219ef185e7fdd6d967985fc57599 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Michael=20Br=C3=BCning?= <michael.bruning@qt.io>
+Date: Thu, 20 May 2021 12:42:18 +0200
+Subject: [PATCH] Bump V8_PATCH_LEVEL
+
+Some backported patches to v8 require us to update the version string,
+otherwise stale cache files might not be cleaned properly.
+
+The V8_PATCH_LEVEL will de facto be decoupled from its upstream
+counterpart, but that should not matter in practice.
+
+Fixes: QTBUG-93744
+Change-Id: I77d0d2a5b011955d22e6ae4c2eb45406f4c52863
+Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
+---
+ chromium/v8/include/v8-version.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/chromium/v8/include/v8-version.h b/chromium/v8/include/v8-version.h
+index cc87cda0776..298c9f74e02 100644
+--- a/src/3rdparty/chromium/v8/include/v8-version.h
++++ b/src/3rdparty/chromium/v8/include/v8-version.h
+@@ -11,7 +11,7 @@
+ #define V8_MAJOR_VERSION 8
+ #define V8_MINOR_VERSION 7
+ #define V8_BUILD_NUMBER 220
+-#define V8_PATCH_LEVEL 31
++#define V8_PATCH_LEVEL 32
+ 
+ // Use 1 for candidates and 0 otherwise.
+ // (Boolean macro values are not supported by all preprocessors.)
diff --git a/srcpkgs/qt5-webengine/template b/srcpkgs/qt5-webengine/template
index 08214144527..d9819ea7d71 100644
--- a/srcpkgs/qt5-webengine/template
+++ b/srcpkgs/qt5-webengine/template
@@ -1,7 +1,7 @@
 # Template file for 'qt5-webengine'
 pkgname=qt5-webengine
 version=5.15.4
-revision=1
+revision=2
 _commit=0d4ca9cfb0d6e538172005e1c4b0b3a021b1c18c
 _chromium_commit=3f594ea1afb8b18c864715a796ef21099d432a13
 archs="x86_64* i686* armv[67]* ppc64* aarch64*"