diff --git a/bootiso b/bootiso
index 863a0fe..a2d8444 100755
--- a/bootiso
+++ b/bootiso
@@ -4,12 +4,12 @@
 #
 # Author: jules randolph <jules.sam.randolph@gmail.com> https://github.com/jsamr
 # License: MIT
-# Version 3.3.0
+# Version 3.3.1
 
 set -o pipefail
 set -E
 
-version="3.3.0"
+version="3.3.1"
 scriptName=$(basename "$0")
 bashVersion=$(echo "$BASH_VERSION" | cut -d. -f1)
 
@@ -395,10 +395,10 @@ initPckgManager() {
 checkSudo() {
 	if ((EUID != 0)); then
 		if [[ -t 1 ]]; then
-			sudo --preserve-env="$environementVariables" "$0" "$@"
+			sudo --preserve-env "$0" "$@"
 		else
 			exec 1>output_file
-			gksu --preserve-env="$environementVariables" "$0" "$@"
+			gksu --preserve-env "$0" "$@"
 		fi
 		exit
 	fi
diff --git a/changelog.md b/changelog.md
index a5c18f9..0cb2e9b 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,11 +1,17 @@
+# v3.3.1
+
+**Bugfixes**
+
+- fix incompatibility with older `sudo` versions where `--preserve-env` doesn't support passing a list of variables, [#47](https://github.com/jsamr/bootiso/issues/47)
+
 # v3.3.0
 
 **Features**
 
-- check ISO hash automatically, #16
-- disable automatic ISO hash check with `-H, --no-hash-check` flag
-- exit when hash fails with `--force-hash-check` flag
-- explicitly set a hash file with `--hash-file <file>` flag
+- check ISO hash automatically, #16, (@SibrenVasse)
+- disable automatic ISO hash check with `-H, --no-hash-check` flag (@SibrenVasse)
+- exit when hash fails with `--force-hash-check` flag (@SibrenVasse)
+- explicitly set a hash file with `--hash-file <file>` flag (@SibrenVasse)
 
 **Bugfixes**