diff --git a/dti_reviewer/backend/environment.yml b/dti_reviewer/backend/environment.yml
index 7ca7893..0378e21 100644
--- a/dti_reviewer/backend/environment.yml
+++ b/dti_reviewer/backend/environment.yml
@@ -12,4 +12,4 @@ dependencies:
   - sphinx
   - celery
   - redis-py
-
+  - pytables
diff --git a/dti_reviewer/backend/tasks.py b/dti_reviewer/backend/tasks.py
index a510af8..46155b7 100644
--- a/dti_reviewer/backend/tasks.py
+++ b/dti_reviewer/backend/tasks.py
@@ -1,5 +1,5 @@
 from celery_app import celery
-from similarity_engine import SimilarityEngine
+from similarity_engine import SimilarityEngineOrcid
 from sklearn.metrics.pairwise import cosine_similarity
 
 engine = None
@@ -7,7 +7,7 @@
 def initialize_similarity_engine():
     global engine
     if engine is None:
-        engine = SimilarityEngine()
+        engine = SimilarityEngineOrcid()
         engine.load_index_or_build()