diff --git a/requirements.txt b/requirements.txt
index 9fdcac145770c7932335f5f8d1d2f591a36939dd..cd9eefdef5a687a7801d13d27cf91520030f350c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 lex_ws
-nltk
\ No newline at end of file
+nltk
+pika==0.12
\ No newline at end of file