diff --git a/tools/wptrunner/requirements.txt b/tools/wptrunner/requirements.txt
index aa8fa7f69ef4c6..e2414b1e43c408 100644
--- a/tools/wptrunner/requirements.txt
+++ b/tools/wptrunner/requirements.txt
@@ -3,7 +3,7 @@ mozdebug==0.3.0
 mozinfo==1.2.2  # https://bugzilla.mozilla.org/show_bug.cgi?id=1621226
 mozlog==7.1.0
 mozprocess==1.3.0
-pillow==8.4.0
+pillow==9.1.1
 requests==2.27.1
 six==1.16.0
 urllib3[secure]==1.26.8