diff --git a/scripts/macmoji b/scripts/macmoji
index ae3635e..4c56a96 100755
--- a/scripts/macmoji
+++ b/scripts/macmoji
@@ -4,15 +4,15 @@
 
 cd "$(dirname "$(realpath "$0")")";
 
-DATE=`date +%s`
-USER=`id -un`
-USER_DICTIONARY_FOLDER=`ls -td -- ~/Library/Dictionaries/CoreDataUbiquitySupport/"${USER}"~*/UserDictionary/* | head -n 1`
+DATE=$(date +%s)
+USER=$(id -un)
+USER_DICTIONARY_FOLDER=$(ls -td -- ~/Library/Dictionaries/CoreDataUbiquitySupport/"${USER}"~*/UserDictionary/* | head -n 1)
 USER_DICTIONARY="${USER_DICTIONARY_FOLDER}/store/UserDictionary.db"
 GLOBAL_PREFERENCES="/Users/${USER}/Library/Preferences/.GlobalPreferences.plist"
 PLIST_BUDDY="/usr/libexec/PlistBuddy"
 SQLITE="/usr/bin/sqlite3"
 EMOJI_SUBSTITUTIONS="../emoji substitutions.plist"
-COUNT=`${PLIST_BUDDY} -c 'Print' "${EMOJI_SUBSTITUTIONS}" | grep 'Dict' | wc -l`
+COUNT=$(${PLIST_BUDDY} -c 'Print' "${EMOJI_SUBSTITUTIONS}" | grep -c 'Dict')
 
 contains () {
   local e
@@ -20,7 +20,7 @@ contains () {
   declare -a arr=("${@:3}")
   for e in "${arr[@]}"; do
     if [[ "$e" == "$1" ]]; then
-      if [[ "${arr[$(($i + 1))]}" == "$2" ]]; then
+      if [[ "${arr[$i + 1]}" == "$2" ]]; then
         return 0
       fi
     fi
@@ -32,20 +32,20 @@ contains () {
 install() {
   echo "Installing Macmoji text replacements..."
 
-  PK_LAST=`${SQLITE} "${USER_DICTIONARY}" "SELECT Z_PK FROM ZUSERDICTIONARYENTRY ORDER BY Z_PK DESC LIMIT 1;"`
+  PK_LAST=$(${SQLITE} "${USER_DICTIONARY}" "SELECT Z_PK FROM ZUSERDICTIONARYENTRY ORDER BY Z_PK DESC LIMIT 1;")
 
-  pk=$(($PK_LAST))
-  cnt=`echo -e "${COUNT}" | tr -d '[[:space:]]'`
+  pk=$PK_LAST
+  cnt=$(echo -e "${COUNT}" | tr -d '[[:space:]]')
   plist=''
   sql=''
 
-  while [ $cnt -gt 0 ]; do
-    let cnt-=1
-    let pk+=1
-    replace=`${PLIST_BUDDY} -c "Print :${cnt}:shortcut" "${EMOJI_SUBSTITUTIONS}"`
-    with=`${PLIST_BUDDY} -c "Print :${cnt}:phrase" "${EMOJI_SUBSTITUTIONS}"`
+  while [ "${cnt}" -gt 0 ]; do
+    ((cnt-=1))
+    ((pk+=1))
+    replace=$(${PLIST_BUDDY} -c "Print :${cnt}:shortcut" "${EMOJI_SUBSTITUTIONS}")
+    with=$(${PLIST_BUDDY} -c "Print :${cnt}:phrase" "${EMOJI_SUBSTITUTIONS}")
     plist+="{on=1;replace=\"${replace}\";with=\"${with}\";},"
-    sql+="INSERT INTO 'ZUSERDICTIONARYENTRY' VALUES($((${pk})),1,1,0,0,0,0,${DATE},NULL,NULL,NULL,NULL,NULL,\"${with}\",\"${replace}\",NULL);"
+    sql+="INSERT INTO 'ZUSERDICTIONARYENTRY' VALUES(${pk},1,1,0,0,0,0,${DATE},NULL,NULL,NULL,NULL,NULL,\"${with}\",\"${replace}\",NULL);"
   done
 
   $SQLITE "${USER_DICTIONARY}" "${sql}"
@@ -56,28 +56,28 @@ uninstall() {
   echo "Uninstalling Macmoji text replacements..."
 
   seen=()
-  cnt=`echo -e "${COUNT}" | tr -d '[[:space:]]'`
+  cnt=$(echo -e "${COUNT}" | tr -d '[[:space:]]')
 
-  while [ $cnt -gt 0 ]; do
-    let cnt-=1
-    let pk+=1
-    replace=`${PLIST_BUDDY} -c "Print :${cnt}:shortcut" "${EMOJI_SUBSTITUTIONS}"`
-    with=`${PLIST_BUDDY} -c "Print :${cnt}:phrase" "${EMOJI_SUBSTITUTIONS}"`
+  while [ "${cnt}" -gt 0 ]; do
+    ((cnt-=1))
+    ((pk+=1))
+    replace=$(${PLIST_BUDDY} -c "Print :${cnt}:shortcut" "${EMOJI_SUBSTITUTIONS}")
+    with=$(${PLIST_BUDDY} -c "Print :${cnt}:phrase" "${EMOJI_SUBSTITUTIONS}")
     arr=("$replace" "$with")
     seen+=("${arr[@]}")
     sql+="DELETE FROM 'ZUSERDICTIONARYENTRY' WHERE ZPHRASE = \"${with}\" AND ZSHORTCUT = \"${replace}\";"
   done
   $SQLITE "${USER_DICTIONARY}" "${sql}"
 
-  EXISTING_COUNT=`${PLIST_BUDDY} -c 'Print :NSUserDictionaryReplacementItems' "${GLOBAL_PREFERENCES}" | grep 'Dict' | wc -l`
-  existing_cnt=`echo -e "${EXISTING_COUNT}" | tr -d '[[:space:]]'`
+  EXISTING_COUNT=$(${PLIST_BUDDY} -c 'Print :NSUserDictionaryReplacementItems' "${GLOBAL_PREFERENCES}" | grep -c 'Dict')
+  existing_cnt=$(echo -e "${EXISTING_COUNT}" | tr -d '[[:space:]]')
 
-  while [ $existing_cnt -gt 0 ]; do
-    let existing_cnt-=1
-    replace=`${PLIST_BUDDY} -c "Print :NSUserDictionaryReplacementItems:$(($existing_cnt)):replace" "${GLOBAL_PREFERENCES}"`
-    with=`${PLIST_BUDDY} -c "Print :NSUserDictionaryReplacementItems:$(($existing_cnt)):with" "${GLOBAL_PREFERENCES}"`
-    if contains $replace $with "${seen[@]}"; then
-      ${PLIST_BUDDY} -c "Delete :NSUserDictionaryReplacementItems:$(($existing_cnt))" "${GLOBAL_PREFERENCES}"
+  while [ "$existing_cnt" -gt 0 ]; do
+    ((existing_cnt-=1))
+    replace=$(${PLIST_BUDDY} -c "Print :NSUserDictionaryReplacementItems:$existing_cnt:replace" "${GLOBAL_PREFERENCES}")
+    with=$(${PLIST_BUDDY} -c "Print :NSUserDictionaryReplacementItems:$existing_cnt:with" "${GLOBAL_PREFERENCES}")
+    if contains "$replace" "$with" "${seen[@]}"; then
+      ${PLIST_BUDDY} -c "Delete :NSUserDictionaryReplacementItems:$existing_cnt" "${GLOBAL_PREFERENCES}"
     fi
   done
 }