diff --git a/postinstall b/postinstall
index 31ce909..8f9a7ec 100755
--- a/postinstall
+++ b/postinstall
@@ -276,16 +276,16 @@ set_pve_repo(){
     test=$(grep pvetest /etc/apt/sources.list)
     if [[ $repo_selection == "pve-enterprise" ]]; then
         pvesh set nodes/px1/apt/repositories --handle enterprise
-        sed -i "s/$nosub/# $nosub/g" /etc/apt/sources.list
-        sed -i "s/$test/# $test/g" /etc/apt/sources.list
+        sed -i "s|$nosub|# $nosub|g" /etc/apt/sources.list
+        sed -i "s|$test|# $test|g" /etc/apt/sources.list
     elif [[ $repo_selection == "pve-no-subscription" ]]; then
         pvesh set nodes/px1/apt/repositories --handle no-subscription
-        sed -i "s/$enterprise/# $enterprise/g" /etc/apt/sources.list.d/pve-enterprise.list
-        sed -i "s/$test/# $test/g" /etc/apt/sources.list
+        sed -i "s|$enterprise|# $enterprise|g" /etc/apt/sources.list.d/pve-enterprise.list
+        sed -i "s|$test|# $test|g" /etc/apt/sources.list
     elif [[ $repo_selection == "pvetest" ]]; then
         pvesh set nodes/px1/apt/repositories --handle test
-        sed -i "s/$nosub/# $nosub/g" /etc/apt/sources.list
-        sed -i "s/$enterprise/# $enterprise/g" /etc/apt/sources.list.d/pve-enterprise.list
+        sed -i "s|$nosub|# $nosub|g" /etc/apt/sources.list
+        sed -i "s|$enterprise|# $enterprise|g" /etc/apt/sources.list.d/pve-enterprise.list
     fi
 }