diff --git a/Cargo.toml b/Cargo.toml
index b197d2e..5da1a76 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -42,12 +42,12 @@ members = [
 ]
 
 [dependencies]
-futures-core-preview = "=0.3.0-alpha.18"
-futures-sink-preview = "=0.3.0-alpha.18"
-futures-util-preview = "=0.3.0-alpha.18"
-tokio-codec = "=0.2.0-alpha.5"
-tokio-io = { version = "=0.2.0-alpha.5", features = ["util"] }
-tokio-sync = "=0.2.0-alpha.5"
+futures-core-preview = "=0.3.0-alpha.19"
+futures-sink-preview = "=0.3.0-alpha.19"
+futures-util-preview = "=0.3.0-alpha.19"
+tokio-codec = "=0.2.0-alpha.6"
+tokio-io = { version = "=0.2.0-alpha.6", features = ["util"] }
+tokio-sync = "=0.2.0-alpha.6"
 bytes = "0.4.7"
 http = "0.1.8"
 log = "0.4.1"
@@ -69,9 +69,10 @@ serde = "1.0.0"
 serde_json = "1.0.0"
 
 # Akamai example
-tokio = "=0.2.0-alpha.5"
+tokio = "=0.2.0-alpha.6"
 env_logger = { version = "0.5.3", default-features = false }
 rustls = "0.16"
-tokio-rustls = "0.12.0-alpha.2"
+# tokio-rustls = "0.12.0-alpha.2"
+tokio-rustls = { git = "https://github.com/taiki-e/tokio-rustls", branch = "tokio02alpha6" }
 webpki = "0.21"
 webpki-roots = "0.17"
diff --git a/tests/h2-fuzz/Cargo.toml b/tests/h2-fuzz/Cargo.toml
index 565a453..faee599 100644
--- a/tests/h2-fuzz/Cargo.toml
+++ b/tests/h2-fuzz/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2018"
 h2 = { path = "../.." }
 
 env_logger = { version = "0.5.3", default-features = false }
-futures-preview = "=0.3.0-alpha.18"
+futures-preview = "=0.3.0-alpha.19"
 honggfuzz = "0.5"
 http = "0.1.3"
-tokio = "=0.2.0-alpha.5"
+tokio = "=0.2.0-alpha.6"
diff --git a/tests/h2-support/Cargo.toml b/tests/h2-support/Cargo.toml
index 5b708b5..acb2ab2 100644
--- a/tests/h2-support/Cargo.toml
+++ b/tests/h2-support/Cargo.toml
@@ -9,7 +9,7 @@ h2 = { path = "../..", features = ["unstable-stream", "unstable"] }
 
 bytes = "0.4.7"
 env_logger = "0.5.9"
-futures-preview = "=0.3.0-alpha.18"
+futures-preview = "=0.3.0-alpha.19"
 http = "0.1.5"
 string = "0.2"
-tokio = "=0.2.0-alpha.5"
+tokio = "=0.2.0-alpha.6"
diff --git a/tests/h2-tests/Cargo.toml b/tests/h2-tests/Cargo.toml
index 6d75942..c5c5f73 100644
--- a/tests/h2-tests/Cargo.toml
+++ b/tests/h2-tests/Cargo.toml
@@ -10,5 +10,5 @@ edition = "2018"
 [dev-dependencies]
 h2-support = { path = "../h2-support" }
 log = "0.4.1"
-futures-preview = "=0.3.0-alpha.18"
-tokio = "=0.2.0-alpha.5"
+futures-preview = "=0.3.0-alpha.19"
+tokio = "=0.2.0-alpha.6"