diff --git a/splade4elastic/__init__.py b/splade4elastic/__init__.py
index a60a891..edfd7bb 100644
--- a/splade4elastic/__init__.py
+++ b/splade4elastic/__init__.py
@@ -1,2 +1,2 @@
-__version__ = "0.0.2"
+__version__ = "0.0.21"
 from .elastic_splade import SpladeRewriter, MLMBaseRewriter, LinearMLMRewriter
diff --git a/test/requirements.txt b/test/requirements.txt
index acff49e..c72c122 100644
--- a/test/requirements.txt
+++ b/test/requirements.txt
@@ -1,3 +1,4 @@
 numpy>=1.21.2
 pandas>=1.3.0
 scikit-learn>=0.19.0
+transformers>=4.0.0
\ No newline at end of file