diff --git a/requirements.txt b/requirements.txt
index 4704faa47..2979bdfc6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,6 @@ preshed>=2.0.1,<2.1.0
 thinc==7.0.0.dev4
 blis>=0.2.2,<0.3.0
 murmurhash>=0.28.0,<1.1.0
-cytoolz>=0.9.0,<0.10.0
 plac<1.0.0,>=0.9.6
 regex==2018.01.10
 requests>=2.13.0,<3.0.0