diff --git a/core b/core
index ef4e314..500eba4 100644
--- a/core
+++ b/core
@@ -139,10 +139,10 @@ GET_INFO_HASH() {
 }
 
 CONVERSION_PATH() {
-    RELATIVE_PATH="${FILE_PATH#${DOWNLOAD_DIR}/}"
+    RELATIVE_PATH="${FILE_PATH#"${DOWNLOAD_DIR}/"}"
     TASK_FILE_NAME="${RELATIVE_PATH%%/*}"
     TASK_PATH="${DOWNLOAD_DIR}/${TASK_FILE_NAME}"
-    DEST_PATH_SUFFIX="${TASK_PATH#${ARIA2_DOWNLOAD_DIR}}"
+    DEST_PATH_SUFFIX="${TASK_PATH#"${ARIA2_DOWNLOAD_DIR}"}"
 }
 
 OUTPUT_LOG() {