diff --git a/prepro/requirements.txt b/prepro/requirements.txt
old mode 100755
new mode 100644
index adc1d46..709781f
--- a/prepro/requirements.txt
+++ b/prepro/requirements.txt
@@ -53,7 +53,7 @@ olefile==0.45.1
 pandas==0.23.4
 pbr==5.1.1
 pexpect==4.2.1
-Pillow==5.1.0
+Pillow==9.0.0
 protobuf==3.6.1
 pycairo==1.16.2
 pycrypto==2.6.1