diff --git a/Cargo.toml b/Cargo.toml
index 92c6b24..69ba2d6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,7 +23,7 @@ env_logger = { version = "0.6", default-features = false, features = [ "termcolo
 clap       = "2.33"
 mio        = { version = "0.6", default-features = false }
 ctrlc      = { version = "3.1", features = ["termination"] }
-smoltcp    = { version = "0.5", default-features = false, features = [ "std", "log", "proto-ipv4", "proto-ipv6" ] }
+smoltcp    = { version = "0.7", default-features = false, features = [ "std", "log", "proto-ipv4", "proto-ipv6" ] }
 
 tun         = { path = "crates/tun", features = ["mio"] }
 crypto      = { path = "crates/crypto" }
diff --git a/crates/netlink/Cargo.toml b/crates/netlink/Cargo.toml
index 87878ae..f2dc0e7 100644
--- a/crates/netlink/Cargo.toml
+++ b/crates/netlink/Cargo.toml
@@ -11,4 +11,4 @@ log       = "0.4"
 libc      = "0.2"
 bitflags  = "1.1"
 byteorder = "1.3"
-smoltcp   = { version = "0.5", default-features = false, features = [ "std", "log", "proto-ipv4", "proto-ipv6" ] }
\ No newline at end of file
+smoltcp   = { version = "0.7", default-features = false, features = [ "std", "log", "proto-ipv4", "proto-ipv6" ] }
\ No newline at end of file
diff --git a/crates/sysconfig/Cargo.toml b/crates/sysconfig/Cargo.toml
index d8091e5..c5dc31c 100644
--- a/crates/sysconfig/Cargo.toml
+++ b/crates/sysconfig/Cargo.toml
@@ -8,7 +8,7 @@ edition = "2018"
 
 [dependencies]
 log     = "0.4"
-smoltcp = { version = "0.5", default-features = false, features = [ "std", "log", "proto-ipv4", "proto-ipv6" ] }
+smoltcp = { version = "0.7", default-features = false, features = [ "std", "log", "proto-ipv4", "proto-ipv6" ] }
 
 [target.'cfg(unix)'.dependencies]
 libc   = "0.2"