diff --git a/src/install.sh b/src/install.sh
index f23bc22..f245745 100644
--- a/src/install.sh
+++ b/src/install.sh
@@ -21,7 +21,9 @@ fi
 
 BASE=$(basename "$BOOT")
 BASE="${BASE%%\?*}"
-
+: "${BASE//+/ }"; printf -v BASE '%b' "${_//%/\\x}"
+BASE=$(echo "$BASE" | sed -e 's/[^A-Za-z0-9._-]/_/g')
+    
 [ -f "$STORAGE/$BASE" ] && return 0
 
 TMP="$STORAGE/${BASE%.*}.tmp"