diff --git a/projects/blueprint/src/app/core/service/config/config.service.ts b/projects/blueprint/src/app/core/service/config/config.service.ts
index 2d5d6f0..c6e8f36 100644
--- a/projects/blueprint/src/app/core/service/config/config.service.ts
+++ b/projects/blueprint/src/app/core/service/config/config.service.ts
@@ -5,6 +5,7 @@ import { LibraryConfigurationService } from '@blueprint/service/library-configur
 
 import { Observable, tap } from 'rxjs';
 import { environment } from '../../../../environments/environment';
+import { FullTextSearchDialect } from "@blueprint/service/sparql/sparql.service";
 @Injectable({
   providedIn: 'root'
 })
@@ -37,7 +38,7 @@ export class ConfigService {
       this._libraryConfigurationService.sparqlConsoleUrl = environment.sparqlConsoleUrl;
       this._libraryConfigurationService.graphExplorerUrl = environment.graphExplorerUrl;
       this._libraryConfigurationService.production = environment.production;
-      this._libraryConfigurationService.fullTextSearchDialect = environment.fullTextSearchDialect as "fuseki" | "stardog";
+      this._libraryConfigurationService.fullTextSearchDialect = environment.fullTextSearchDialect;
 
     }))
   }
@@ -51,5 +52,5 @@ export type FluxConfig = {
   readonly endpointUrl: string,
   readonly sparqlConsoleUrl: string,
   readonly graphExplorerUrl: string,
-  readonly fullTextSearchDialect: 'fuseki' | 'stardog'
+  readonly fullTextSearchDialect: FullTextSearchDialect
 }
diff --git a/projects/blueprint/src/app/core/service/library-configuration/library-configuration.service.ts b/projects/blueprint/src/app/core/service/library-configuration/library-configuration.service.ts
index 9df16c5..5378f93 100644
--- a/projects/blueprint/src/app/core/service/library-configuration/library-configuration.service.ts
+++ b/projects/blueprint/src/app/core/service/library-configuration/library-configuration.service.ts
@@ -22,7 +22,7 @@ export class LibraryConfigurationService {
     return this.configuration.fullTextSearchDialect;
   }
 
-  set fullTextSearchDialect(value: 'fuseki' | 'stardog' | 'neptune' | 'graphdb') {
+  set fullTextSearchDialect(value: FullTextSearchDialect) {
     switch (value) {
       case 'fuseki':
         this.configuration.fullTextSearchDialect = FullTextSearchDialect.FUSEKI;
diff --git a/projects/blueprint/src/app/core/service/sparql/sparql.service.ts b/projects/blueprint/src/app/core/service/sparql/sparql.service.ts
index 589bd2b..2201550 100644
--- a/projects/blueprint/src/app/core/service/sparql/sparql.service.ts
+++ b/projects/blueprint/src/app/core/service/sparql/sparql.service.ts
@@ -29,9 +29,9 @@ export class SparqlService {
 
   /**
    * Execute a SPARQL SELECT query
-   * 
+   *
    * @param query The SPARQL SELECT query
-   * @returns an observable of the resulting bindings 
+   * @returns an observable of the resulting bindings
    */
   select(query: string): Observable<Record<string, SparqlResultTerm>[]> {
     const endpoint = this.libraryConfigurationService.endpointUrl;
@@ -58,7 +58,7 @@ export class SparqlService {
 
   /**
    * Execute a SPARQL CONSTRUCT query
-   * 
+   *
    * @param query The SPARQL CONSTRUCT query
    * @returns an observable of the resulting dataset
    */
@@ -96,4 +96,4 @@ export enum FullTextSearchDialect {
   STARDOG = 'stardog',
   NEPTUNE = 'neptune',
   GRAPHDB = 'graphdb'
-}
\ No newline at end of file
+}
diff --git a/projects/blueprint/src/environments/environment.development.ts b/projects/blueprint/src/environments/environment.development.ts
index 4863cc8..9a5f2fd 100644
--- a/projects/blueprint/src/environments/environment.development.ts
+++ b/projects/blueprint/src/environments/environment.development.ts
@@ -2,12 +2,14 @@
 // `ng build --configuration production` replaces `environment.ts` with `environment.prod.ts`.
 // The list of file replacements can be found in `angular.json`.
 
+import { FullTextSearchDialect } from "@blueprint/service/sparql/sparql.service";
+
 export const environment = {
     production: false,
     endpointUrl: 'http://localhost:4200/query',  // this will be overwritten by /src/config.json
     sparqlConsoleUrl: null, // e.g. yasgui -> will be overwritten by /src/config.json
     graphExplorerUrl: null, // this will be overwritten by /src/config.json
-    fullTextSearchDialect: 'neptune', // this will be overwritten by /src/config.json
+    fullTextSearchDialect: 'neptune' as FullTextSearchDialect, // this will be overwritten by /src/config.json
     neptune: {
         ftsEndpoint: "https://vpc-opensearch-zazuko-blueprint-glbaecqrcqwr5om3z5jj2duuiq.eu-central-1.es.amazonaws.com"
     } // this will be overwritten by /src/config.json// this will be overwritten by /src/config.json
diff --git a/projects/blueprint/src/environments/environment.ts b/projects/blueprint/src/environments/environment.ts
index 4ba918a..ee345ab 100644
--- a/projects/blueprint/src/environments/environment.ts
+++ b/projects/blueprint/src/environments/environment.ts
@@ -1,9 +1,11 @@
+import type { FullTextSearchDialect } from "@blueprint/service/sparql/sparql.service";
+
 export const environment = {
     production: true,
     endpointUrl: 'https://ld.flux.zazuko.com/query', // this will be overwritten by /src/config.json
     sparqlConsoleUrl: null, // e.g. yasgui -> will be overwritten by /src/config.json
     graphExplorerUrl: null, // this will be overwritten by /src/config.json
-    fullTextSearchDialect: 'neptune', // this will be overwritten by /src/config.json
+    fullTextSearchDialect: 'neptune' as FullTextSearchDialect, // this will be overwritten by /src/config.json
     neptune: {
         ftsEndpoint: "https://vpc-opensearch-zazuko-blueprint-glbaecqrcqwr5om3z5jj2duuiq.eu-central-1.es.amazonaws.com"
     } // this will be overwritten by /src/config.json