diff --git a/requirements.txt b/requirements.txt
index 6e74329f5..3b0e425d5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,8 +2,6 @@
 
 # Optionals
 trio==0.19.0
-curio==1.4; python_version < '3.7'
-curio==1.5; python_version >= '3.7'
 
 # Docs
 mkdocs==1.2.3