diff --git a/requirements.txt b/requirements.txt
index d625ad8..c943e14 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,7 @@
 farm-haystack[faiss,inference]==1.23.0
 haystack-entailment-checker
 plotly==5.14.1
+pydantic<2
 
 # commented to not interfere with streamlit SDK in HF spces
 # uncomment for local installation