diff --git a/Cargo.toml b/Cargo.toml
index 97bd6ee..207cc28 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ test-full-imap = []
 
 [dependencies]
 native-tls = { version = "0.2.2", optional = true }
-rustls-connector = { version = "0.18.1", optional = true }
+rustls-connector = { version = "0.18.0", optional = true }
 regex = "1.0"
 bufstream = "0.1.3"
 imap-proto = "0.16.1"
@@ -33,7 +33,7 @@ ouroboros = "0.15.0"
 
 [dev-dependencies]
 lettre = "0.10"
-rustls-connector = "0.18.1"
+rustls-connector = "0.18.0"
 structopt = "0.3"
 
 # to make -Zminimal-versions work