diff --git a/acmed/Cargo.toml b/acmed/Cargo.toml
index 32fab1c..7cca534 100644
--- a/acmed/Cargo.toml
+++ b/acmed/Cargo.toml
@@ -21,7 +21,7 @@ openssl_vendored = ["crypto_openssl", "acme_common/openssl_vendored", "attohttpc
 
 [dependencies]
 acme_common = { path = "../acme_common" }
-attohttpc = { version = "0.16", default-features = false, features = ["charsets", "json"] }
+attohttpc = { version = "0.17", default-features = false, features = ["charsets", "json"] }
 bincode = "1.3"
 clap = "2.32"
 glob = "0.3"