diff --git a/qrscan/download.sh b/qrscan/download.sh
index 6ca0122..4f0d188 100755
--- a/qrscan/download.sh
+++ b/qrscan/download.sh
@@ -2,25 +2,28 @@
 
 set -euo pipefail
 
-version="${1:-0.1.6}"
-echo "Downloading version $version"
+(
+    cd "$(dirname "$0")"
+    version="${1:-0.1.6}"
+    echo "Downloading version $version"
 
-tools=(wget tar unzip)
+    tools=(wget tar unzip)
 
-tools_installed="true"
-for tool in "${tools[@]}"; do
-    if ! which "$tool" &> /dev/null; then
-        echo "please install $tool"
-        tools_installed="false"
+    tools_installed="true"
+    for tool in "${tools[@]}"; do
+        if ! which "$tool" &> /dev/null; then
+            echo "please install $tool"
+            tools_installed="false"
+        fi
+    done
+    if ! "$tools_installed"; then
+        exit 1
     fi
-done
-if ! "$tools_installed"; then
-    exit 1
-fi
 
-wget -O "qrscan-linux.tar.gz" "https://github.com/sayanarijit/qrscan/releases/download/v$version/qrscan-$version-x86_64-unknown-linux-gnu.tar.gz"
-tar --overwrite -xf "qrscan-linux.tar.gz"
-rm "qrscan-linux.tar.gz"
-wget -O "qrscan-windows.zip" "https://github.com/sayanarijit/qrscan/releases/download/v$version/qrscan-$version-x86_64-pc-windows-gnu.zip"
-unzip --overwrite -xf "qrscan-windows.zip"
-rm "qrscan-windows.zip"
+    wget -O "qrscan-linux.tar.gz" "https://github.com/sayanarijit/qrscan/releases/download/v$version/qrscan-$version-x86_64-unknown-linux-gnu.tar.gz"
+    tar --overwrite -xf "qrscan-linux.tar.gz"
+    rm "qrscan-linux.tar.gz"
+    wget -O "qrscan-windows.zip" "https://github.com/sayanarijit/qrscan/releases/download/v$version/qrscan-$version-x86_64-pc-windows-gnu.zip"
+    unzip -o "qrscan-windows.zip"
+    rm "qrscan-windows.zip"
+)