diff --git a/requirements.txt b/requirements.txt
index 5f0f8b01..df1685c1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,10 @@
 scipy==1.5.4
-numpy==1.22.0
+numpy==1.19.2
 gensim==3.8.3
-nltk==3.6.6
+nltk==3.5
 torch==1.7.0
 psutil==5.8.0
 SPARQLWrapper==1.8.5
 matplotlib==3.3.4
+rdflib==4.2.1
+tqdm