diff --git a/src/main/services/hydra-api.ts b/src/main/services/hydra-api.ts
index 0e6de36b..16a7e541 100644
--- a/src/main/services/hydra-api.ts
+++ b/src/main/services/hydra-api.ts
@@ -340,7 +340,7 @@ export class HydraApi {
 
     const headers = {
       ...this.getAxiosConfig().headers,
-      "If-Modified-Since": options?.ifModifiedSince?.toUTCString(),
+      "Hydra-If-Modified-Since": options?.ifModifiedSince?.toUTCString(),
     };
 
     return this.instance