diff --git a/examples/requirements.txt b/examples/requirements.txt
index 42abe893..b44e8617 100644
--- a/examples/requirements.txt
+++ b/examples/requirements.txt
@@ -1,2 +1,3 @@
 tensorboardX
-scikit-learn
\ No newline at end of file
+scikit-learn
+seqeval
\ No newline at end of file