diff --git a/requirements.txt b/requirements.txt
index cbddbb9..29da098 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,3 +6,7 @@ Flask-Limiter==1.4
 waitress==1.4.4
 langdetect==1.0.8
 expiringdict==1.2.1
+pyicu==2.6
+pycld2==0.41
+morfessor==2.0.6
+polyglot==16.7.4