diff --git a/Cargo.toml b/Cargo.toml
index 802a9daf6..e209a069b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -90,7 +90,7 @@ required-features = ["repl"]
 
 
 [features]
-default = ["nightly"]
+default = []
 internals = []
 repl = ["internals", "rustyline", "log", "pretty_env_logger", "ansi_term"]
 vendored = ["async-native-tls/vendored", "async-smtp/native-tls-vendored"]
diff --git a/deltachat-ffi/Cargo.toml b/deltachat-ffi/Cargo.toml
index 22af8af1d..3bd11869f 100644
--- a/deltachat-ffi/Cargo.toml
+++ b/deltachat-ffi/Cargo.toml
@@ -25,7 +25,7 @@ anyhow = "1.0.28"
 thiserror = "1.0.14"
 
 [features]
-default = ["vendored", "nightly"]
+default = ["vendored"]
 vendored = ["deltachat/vendored"]
 nightly = ["deltachat/nightly"]
 
diff --git a/rust-toolchain b/rust-toolchain
index 10a652fd3..3987c4729 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-nightly-2020-03-19
+1.43.1