diff --git a/Office_License.sh b/Office_License.sh
index 8240d79..0b3a51d 100644
--- a/Office_License.sh
+++ b/Office_License.sh
@@ -1,6 +1,6 @@
-#!/bin/sh
+#!/bin/bash
 
-<<ABOUT_THIS_SCRIPT
+: <<ABOUT_THIS_SCRIPT
 -----------------------------------------------------------------------
 
 	Written by: Paul Bowden
@@ -50,7 +50,7 @@ ABOUT_THIS_SCRIPT
 PERPETUALLICENSE="/Library/Preferences/com.microsoft.office.licensingV2.plist"
 
 # Detects the presence of a perpetual license
-function DetectPerpetualLicense {
+DetectPerpetualLicense() {
 	if [ -f "$PERPETUALLICENSE" ]; then
 		/bin/echo "Yes"
 	else
@@ -59,52 +59,45 @@ function DetectPerpetualLicense {
 }
 
 # Determines what type of perpetual license the machine has installed
-function PerpetualLicenseType {
+PerpetualLicenseType() {
 	if [ -f "$PERPETUALLICENSE" ]; then
-		/bin/cat "$PERPETUALLICENSE" | /usr/bin/grep -q "A7vRjN2l/dCJHZOm8LKan11/zCYPCRpyChB6lOrgfi"
-		if [ "$?" == "0" ]; then
-				/bin/echo "Office 2019 Volume License"
-				return
+		if /usr/bin/grep -q "A7vRjN2l/dCJHZOm8LKan11/zCYPCRpyChB6lOrgfi" "$PERPETUALLICENSE"; then
+			/bin/echo "Office 2019 Volume License"
+			return
 		fi
-		/bin/cat "$PERPETUALLICENSE" | /usr/bin/grep -q "Bozo+MzVxzFzbIo+hhzTl4JKv18WeUuUhLXtH0z36s"
-		if [ "$?" == "0" ]; then
-				/bin/echo "Office 2019 Preview Volume License"
-				return
+		if /usr/bin/grep -q "Bozo+MzVxzFzbIo+hhzTl4JKv18WeUuUhLXtH0z36s" "$PERPETUALLICENSE"; then
+			/bin/echo "Office 2019 Preview Volume License"
+			return
 		fi
-		/bin/cat "$PERPETUALLICENSE" | /usr/bin/grep -q "A7vRjN2l/dCJHZOm8LKan1Jax2s2f21lEF8Pe11Y+V"
-		if [ "$?" == "0" ]; then
-				/bin/echo "Office 2016 Volume License"
-				return
+		if /usr/bin/grep -q "A7vRjN2l/dCJHZOm8LKan1Jax2s2f21lEF8Pe11Y+V" "$PERPETUALLICENSE"; then
+			/bin/echo "Office 2016 Volume License"
+			return
 		fi
-		/bin/cat "$PERPETUALLICENSE" | /usr/bin/grep -q "DrL/l9tx4T9MsjKloHI5eX"
-		if [ "$?" == "0" ]; then
-				/bin/echo "Office 2016 Home and Business License"
-				return
+		if /usr/bin/grep -q "DrL/l9tx4T9MsjKloHI5eX" "$PERPETUALLICENSE"; then
+			/bin/echo "Office 2016 Home and Business License"
+			return
 		fi
-		/bin/cat "$PERPETUALLICENSE" | /usr/bin/grep -q "C8l2E2OeU13/p1FPI6EJAn"
-		if [ "$?" == "0" ]; then
-				/bin/echo "Office 2016 Home and Student License"
-				return
+		if /usr/bin/grep -q "C8l2E2OeU13/p1FPI6EJAn" "$PERPETUALLICENSE"; then
+			/bin/echo "Office 2016 Home and Student License"
+			return
 		fi
-		/bin/cat "$PERPETUALLICENSE" | /usr/bin/grep -q "Bozo+MzVxzFzbIo+hhzTl4m"
-		if [ "$?" == "0" ]; then
-				/bin/echo "Office 2019 Home and Business License"
-				return
+		if /usr/bin/grep -q "Bozo+MzVxzFzbIo+hhzTl4m" "$PERPETUALLICENSE"; then
+			/bin/echo "Office 2019 Home and Business License"
+			return
 		fi
-		/bin/cat "$PERPETUALLICENSE" | /usr/bin/grep -q "Bozo+MzVxzFzbIo+hhzTl4j"
-		if [ "$?" == "0" ]; then
-				/bin/echo "Office 2019 Home and Student License"
-				return
+		if /usr/bin/grep -q "Bozo+MzVxzFzbIo+hhzTl4j"; then
+			/bin/echo "Office 2019 Home and Student License"
+			return
 		fi
 		/bin/echo "Office Perpetual License"
 	fi
 }
 
 # Creates a list of local usernames with UIDs above 500 (not hidden)
-function DetectO365License {
+DetectO365License() {
 	userList=$( /usr/bin/dscl /Local/Default -list /Users uid | /usr/bin/awk '$2 >= 501 { print $1 }' )
 	
-	while IFS= read aUser
+	while IFS= read -r aUser
 	do
 		# get the user's home folder path
 		homePath=$( eval /bin/echo ~$aUser )
@@ -116,7 +109,7 @@ function DetectO365License {
 		O365SUBBAK2="$homePath/Library/Group Containers/UBF8T346G9.Office/O4kTOBJ0M5ITQxATLEJkQ40SNwQDNtQUOxATL1YUNxQUO2E0e" # hidden file
 	
 		# checks to see if an O365 subscription license file is present for each user
-		if [[ -f "$O365SUBMAIN" || -f "$O365SUBBAK1" || -f "$O365SUBBAK2" || -d "$O365SUBNEW" ]]; then
+		if [ -f "$O365SUBMAIN" ] || [ -f "$O365SUBBAK1" ] || [ -f "$O365SUBBAK2" ] || [ -d "$O365SUBNEW" ]; then
 			activations=$((activations+1))
 		fi
 	done <<< "$userList"
@@ -144,4 +137,4 @@ elif [ "$PERPETUALPRESENT" == "No" ] && [ ! "$O365ACTIVATIONS" ]; then
 	/bin/echo "<result>No license</result>"
 fi
 
-exit 0
\ No newline at end of file
+exit 0