diff --git a/acme_common/Cargo.toml b/acme_common/Cargo.toml
index f1eb772..c465df8 100644
--- a/acme_common/Cargo.toml
+++ b/acme_common/Cargo.toml
@@ -31,7 +31,7 @@ openssl = { version = "0.10", optional = true }
 openssl-sys = { version = "0.9", optional = true }
 punycode = "0.4"
 serde_json = "1.0"
-syslog = "5.0"
+syslog = "6.0"
 tinytemplate = "1.2"
 toml = "0.5"