diff --git a/Jenkinsfile b/Jenkinsfile
index 8197ab9..c4923e6 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -8,16 +8,16 @@ pipeline {
                     // Check for spaces or mixed indentation
                     sh '''
                     # Define file extensions to check
-                    FILE_EXTENSIONS="css|json|js|java|htm|html|cpp|c|h|p|py|go|cs"
+                    FILE_EXTENSIONS="css,json,js,java,htm,html,cpp,c,h,p,py,go,cs"
 
                     echo "Checking for spaces in indentation..."
-                    grep -nrP '^[ ]+' --include="*.{$FILE_EXTENSIONS}" . || echo "No lines with spaces found."
+                    grep -nrP "^[ ]+" --include="*.{$FILE_EXTENSIONS}" . || echo "No lines with spaces found."
 
                     echo "Checking for mixed indentation..."
-                    grep -nrP '^\t+ +' --include="*.{$FILE_EXTENSIONS}" . || echo "No lines with mixed indentation found."
+                    grep -nrP "^\t+ +" --include="*.{$FILE_EXTENSIONS}" . || echo "No lines with mixed indentation found."
 
-                    if grep -nrP '^[ ]+' --include="*.{$FILE_EXTENSIONS}" . || \
-                       grep -nrP '^\t+ +' --include="*.{$FILE_EXTENSIONS}" .; then
+                    if grep -nrP "^[ ]+" --include="*.{$FILE_EXTENSIONS}" . || \
+                       grep -nrP "^\t+ +" --include="*.{$FILE_EXTENSIONS}" .; then
                         echo "Indentation issues detected. Please fix the above lines."
                         exit 1
                     else