diff --git a/crates/bencode/Cargo.toml b/crates/bencode/Cargo.toml
index d4b48b4..84c0404 100644
--- a/crates/bencode/Cargo.toml
+++ b/crates/bencode/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [features]
-default = ["sha1-openssl"]
+default = ["sha1-system"]
 sha1-system = ["sha1w/sha1-system"]
 sha1-openssl = ["sha1w/sha1-openssl"]
 sha1-rust = ["sha1w/sha1-openssl"]
diff --git a/crates/librqbit/Cargo.toml b/crates/librqbit/Cargo.toml
index 1bb1c58..01c9675 100644
--- a/crates/librqbit/Cargo.toml
+++ b/crates/librqbit/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["Igor Katson <igor.katson@gmail.com>"]
 edition = "2018"
 
 [features]
-default = ["sha1-openssl"]
+default = ["sha1-system"]
 sha1-system = ["sha1w/sha1-system"]
 sha1-openssl = ["sha1w/sha1-openssl"]
 sha1-rust = ["sha1w/sha1-openssl"]
diff --git a/crates/rqbit/Cargo.toml b/crates/rqbit/Cargo.toml
index c223b54..963d90a 100644
--- a/crates/rqbit/Cargo.toml
+++ b/crates/rqbit/Cargo.toml
@@ -6,7 +6,7 @@ authors = ["Igor Katson <igor.katson@gmail.com>"]
 edition = "2018"
 
 [features]
-default = ["sha1-openssl"]
+default = ["sha1-system"]
 sha1-system = ["librqbit/sha1-system"]
 sha1-openssl = ["librqbit/sha1-openssl"]
 sha1-rust = ["librqbit/sha1-rust"]
diff --git a/crates/sha1w/Cargo.toml b/crates/sha1w/Cargo.toml
index 110fb08..2c39334 100644
--- a/crates/sha1w/Cargo.toml
+++ b/crates/sha1w/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [features]
-default = ["sha1-openssl"]
+default = ["sha1-system"]
 sha1-system = ["crypto-hash"]
 sha1-openssl = ["openssl"]
 sha1-rust = ["sha1"]
diff --git a/crates/sha1w/src/lib.rs b/crates/sha1w/src/lib.rs
index 244fb0f..a4f0007 100644
--- a/crates/sha1w/src/lib.rs
+++ b/crates/sha1w/src/lib.rs
@@ -83,7 +83,7 @@ impl ISha1 for Sha1System {
 
     fn finish(mut self) -> [u8; 20] {
         let result = self.inner.finish();
-        assert_eq!(result.len(), 20);
+        debug_assert_eq!(result.len(), 20);
         let mut result_arr = [0u8; 20];
         result_arr.copy_from_slice(&result);
         result_arr