diff --git a/entrypoint.sh b/entrypoint.sh
index 8fcb6e4..36d5a70 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -8,7 +8,7 @@ YELLOW='\033[0;33m'
 BLUE='\033[0;34m'
 RED='\033[0;31m'
 
-npm i -g markdown-link-check@3.8.3
+npm i -g markdown-link-check@3.8.4
 
 declare -a FIND_CALL
 declare -a COMMAND_DIRS COMMAND_FILES
@@ -73,7 +73,7 @@ handle_files () {
          echo -e "${RED}ERROR [✖] Can't find the file: ${YELLOW}${FILELIST[index]}${NC}"
          exit 2
       fi
-      if [ $index == 0 ]; then
+      if [ "$index" == 0 ]; then
          COMMAND_FILES+=("-wholename ${FILELIST[index]}")
       else
          COMMAND_FILES+=("-o -wholename ${FILELIST[index]}")
@@ -125,9 +125,9 @@ check_additional_files () {
 
    if [ -n "$FILES" ]; then
       if [ "$MAX_DEPTH" -ne -1 ]; then
-         FIND_CALL=('find' '.' '-type' 'f' '(' ${FILES} ')' '-not' '-path' './node_modules/*' '-maxdepth' "${MAX_DEPTH}" '-exec' 'markdown-link-check' '{}')
+         FIND_CALL=('find' '.' '-type' 'f' '(' "${FILES}" ')' '-not' '-path' './node_modules/*' '-maxdepth' "${MAX_DEPTH}" '-exec' 'markdown-link-check' '{}')
       else
-         FIND_CALL=('find' '.' '-type' 'f' '(' ${FILES} ')' '-not' '-path' './node_modules/*' '-exec' 'markdown-link-check' '{}')
+         FIND_CALL=('find' '.' '-type' 'f' '(' "${FILES}" ')' '-not' '-path' './node_modules/*' '-exec' 'markdown-link-check' '{}')
       fi
 
       add_options
@@ -182,9 +182,9 @@ if [ "$CHECK_MODIFIED_FILES" = "yes" ]; then
 else
 
    if [ "$5" -ne -1 ]; then
-      FIND_CALL=('find' ${FOLDERS} '-name' '*'"${FILE_EXTENSION}" '-not' '-path' './node_modules/*' '-maxdepth' "${MAX_DEPTH}" '-exec' 'markdown-link-check' '{}')
+      FIND_CALL=('find' "${FOLDERS}" '-name' '*'"${FILE_EXTENSION}" '-not' '-path' './node_modules/*' '-maxdepth' "${MAX_DEPTH}" '-exec' 'markdown-link-check' '{}')
    else
-      FIND_CALL=('find' ${FOLDERS} '-name' '*'"${FILE_EXTENSION}" '-not' '-path' './node_modules/*' '-exec' 'markdown-link-check' '{}')
+      FIND_CALL=('find' "${FOLDERS}" '-name' '*'"${FILE_EXTENSION}" '-not' '-path' './node_modules/*' '-exec' 'markdown-link-check' '{}')
    fi
 
    add_options