diff --git a/.env b/.env
index 7f847e29f..69ac3f052 100644
--- a/.env
+++ b/.env
@@ -1,5 +1,6 @@
-DIR=`dirname $0`
-if [ -z "$VIRTUAL_ENV" ] && [ -f $DIR/../venv.mitmproxy/bin/activate ]; then
+DIR="$( dirname "${BASH_SOURCE[0]}" )"
+ACTIVATE_DIR="$(if [ -f "$DIR/../venv.mitmproxy/bin/activate" ]; then echo 'bin'; else echo 'Scripts'; fi;)"
+if [ -z "$VIRTUAL_ENV" ] && [ -f "$DIR/../venv.mitmproxy/$ACTIVATE_DIR/activate" ]; then
     echo "Activating mitmproxy virtualenv..."
-    source $DIR/../venv.mitmproxy/bin/activate
+    source "$DIR/../venv.mitmproxy/$ACTIVATE_DIR/activate"
 fi