diff --git a/.travis.yml b/.travis.yml
index cb55ae9..b670bb3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,5 +16,4 @@ after_success:
 
 env:
   global:
-    - TRAVIS_CARGO_NIGHTLY_FEATURE=nightly
-    - secure: m8BXCWDfBh0Hkajp7+KdSFP65q3gUuJWJSb+W6BtAzWNxIuAwTgtm3Ja3gwwlko+XSOO4IG8+p+ApnduK1znWO+mslhUC7qr8oxIWRS3CzvSr3YeEwfVbWOz34/+I5cGh91ie8pbqxP+buMPVj078W3Cr/STzHhS2ZdQpjR/L8c=
+    secure: m8BXCWDfBh0Hkajp7+KdSFP65q3gUuJWJSb+W6BtAzWNxIuAwTgtm3Ja3gwwlko+XSOO4IG8+p+ApnduK1znWO+mslhUC7qr8oxIWRS3CzvSr3YeEwfVbWOz34/+I5cGh91ie8pbqxP+buMPVj078W3Cr/STzHhS2ZdQpjR/L8c=
diff --git a/Cargo.toml b/Cargo.toml
index 2d8b178..21a552d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,3 +20,7 @@ rust-crypto = "*"
 
 [dev-dependencies]
 env_logger = "*"
+
+
+[features]
+unstable = []