diff --git a/src/lib/datocms-bypass.ts b/src/lib/datocms-bypass.ts
index 61aca81..186cb33 100644
--- a/src/lib/datocms-bypass.ts
+++ b/src/lib/datocms-bypass.ts
@@ -382,7 +382,7 @@ export async function getAllBlogPostsFromSource(datocmsFilters : any) {
 	
 }
 
-async function getSingleBlogPostJsonBySlug(slug) {
+async function getSingleBlogPostJsonBySlug(slug : string) {
 	
 	let jsonDirectory = getBlogJsonDirectoryPath();
 	let jsonFile = slug + '.json';