diff --git a/update.sh b/update.sh
index 9a1c0c0..74f1d7c 100755
--- a/update.sh
+++ b/update.sh
@@ -13,8 +13,6 @@
 # You may NOT use this software for commercial purposes.
 ###############################################################################
 
-set -e
-
 WORKDIR=${0%/*}
 CFG=$WORKDIR/update.cfg
 
@@ -26,7 +24,7 @@ OUT=()
 URL=()
 DNSMASQ_RESTART_COMMAND=()
 if [[ -f $CFG ]]; then
-    . "$CFG"
+    . "$CFG" || exit
 fi
 
 TEMP_DIR=$(mktemp -d -t "${0##*/}.XXXXXX")
@@ -37,9 +35,9 @@ trap 'cleanup' EXIT
 
 copy_perms() {
     local -r FROM=$1 TO=$2
-    chmod --reference="$FROM" -- "$TO"
+    chmod --reference="$FROM" -- "$TO" || exit
     if [[ $UID -eq 0 ]]; then
-        chown --reference="$FROM" -- "$TO"
+        chown --reference="$FROM" -- "$TO" || exit
     fi
 }
 
@@ -50,12 +48,12 @@ replace_with() {
         if [[ -f $ORIG ]]; then
             copy_perms "$ORIG" "$NEW"
             if [[ -n $BACKUPSUFFIX ]]; then
-                mv -- "$ORIG" "$ORIG$BACKUPSUFFIX"
+                mv -- "$ORIG" "$ORIG$BACKUPSUFFIX" || exit
             fi
         else
-            mkdir -p -- "${ORIG%/*}"
+            mkdir -p -- "${ORIG%/*}" || exit
         fi
-        mv -- "$NEW" "$ORIG"
+        mv -- "$NEW" "$ORIG" || exit
     else
         printf 'File "%s" not modified\n' \
             "$ORIG" \
@@ -66,7 +64,7 @@ replace_with() {
 (cd "$WORKDIR" &&
     git submodule update --init 'repos-noupdates/*' &&
     git submodule update --init --remote 'repos/*'
-)
+) || exit
 
 for (( I = 0 ; I < ${#OUT[@]} ; ++I )); do
     MY_URL=${URL[$I]}
@@ -84,13 +82,13 @@ for (( I = 0 ; I < ${#OUT[@]} ; ++I )); do
 
     wget \
         -O "$TEMP_OUT" \
-        "$MY_URL"
+        "$MY_URL" || exit
 
     replace_with "$MY_OUT" "$TEMP_OUT"
 done
 
 TEMP_BLOCKLIST=$(mktemp -p "$TEMP_DIR")
-"$WORKDIR/make-block.pl" --out="$TEMP_BLOCKLIST"
+"$WORKDIR/make-block.pl" --out="$TEMP_BLOCKLIST" || exit
 
 # Blocklist generation succeeded, install it!
 
@@ -102,11 +100,11 @@ if [[ ! -e $BLOCKLIST ]]; then
     # whatever file permissions 'mktemp' sets.
     umask 0022
     touch -- "$BLOCKLIST"
-    )
+    ) || exit
 fi
 
 replace_with "$BLOCKLIST" "$TEMP_BLOCKLIST"
 
 if [[ ${#DNSMASQ_RESTART_COMMAND[@]} -gt 0 ]]; then
-    "${DNSMASQ_RESTART_COMMAND[@]}"
+    "${DNSMASQ_RESTART_COMMAND[@]}" || exit
 fi