diff --git a/requirements_dev.txt b/requirements_dev.txt
index 56cffcdc..3c7cdfcd 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@
 #---------------------------------------------------------
 coveralls==3.3.1
 flake8==4.0.1
-pillow==9.0.1
+pillow==9.1.0
 pytest==7.1.1
 pytest-cache==1.0
 pytest-cov==3.0.0