diff --git a/src/config.py b/src/config.py
index 46b9eb6..d6c5e39 100644
--- a/src/config.py
+++ b/src/config.py
@@ -5,11 +5,13 @@ from pydantic_settings import BaseSettings  # , SettingsConfigDict
 
 
 class JavaVm(BaseModel):
+    id: int
     version: str
     path_to_binary_file: Path
 
 
 class DiffPdf(BaseModel):
+    id: int
     version: str
     path_to_binary_file: Path
     default_params: list[str]
@@ -17,30 +19,34 @@ class DiffPdf(BaseModel):
 
 
 class SaxonJar(BaseModel):
+    id: int
     version: str
     path_to_jar_file: Path
     output_file_extension: str = "fo"
 
 
 class ApacheFop(BaseModel):
+    id: int
     version: str
     path_to_dir: Path
     output_file_extension: str = "pdf"
 
 
 class XslDir(BaseModel):
+    id: int
     name: str
     path_to_root_dir: Path
 
 
 class PdfProject(BaseModel):
+    id: int
     name: str
     project_dir: Path
-    java_version: str
-    diff_pdf_version: str
-    saxon_jar_version: str
-    apache_fop_version: str
-    xsl_dir_name: str
+    java_id: int
+    diff_pdf_id: int
+    saxon_jar_id: int
+    apache_fop_id: int
+    xsl_dir_id: int
     default_xslt_params: dict[str, str] = {}
 
 
@@ -49,6 +55,7 @@ class AppSettings(BaseSettings):
     diff_pdfs: list[DiffPdf]
     saxon_jars: list[SaxonJar]
     apache_fops: list[ApacheFop]
+    xsl_dirs: list[XslDir]
     pdf_projects: list[PdfProject] = []