diff --git a/Cargo.toml b/Cargo.toml
index 0e973465..44efba80 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,7 +40,7 @@ foundations = { version = "4", default-features = false }
 futures = { version = "0.3" }
 futures-util = { version = "0.3", default-features = false }
 h3i = { version = "0.4", path = "./h3i" }
-ipnetwork = { version = "0.20" }
+ipnetwork = { version = "0.21" }
 libc = { version = "0.2.76", default-features = false }
 log = { version = "0.4.20" }
 mio = { version = "0.8" }