diff --git a/installAptCacher.sh b/installAptCacher.sh
index 832d5e3073f4f11b84bbe957ffe524c0cbc1ce06..cc6324245f2bd6bc01b67f857a3624dfe30b103e 100755
--- a/installAptCacher.sh
+++ b/installAptCacher.sh
@@ -17,10 +17,7 @@ then
 fi
 
 # Add PassThrough for HTTPS backends
-if [ -z "`grep PassThroughPattern /etc/apt-cacher-ng/acng.conf`" ]
-then
-    echo 'PassThroughPattern: .*' >> /etc/apt-cacher-ng/acng.conf
-fi
+sed -i -e 's/^# \(PassThroughPattern: \.\*\)/\1/' /etc/apt-cacher-ng/acng.conf
  
 # Start service
 systemctl start apt-cacher-ng.service