diff --git a/Cargo.toml b/Cargo.toml
index 77f3fa05..183d2ffb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -61,6 +61,9 @@ webpki-roots = ["dep:webpki-root-certs"]
 # Optional disable internal proxy cache
 internal_proxy_sys_no_cache = []
 
+# Optional enable impersonate from str
+impersonate_str = []
+
 # Internal (PRIVATE!) features used to aid testing.
 # Don't rely on these whatsoever. They may disappear at anytime.
 
@@ -92,7 +95,7 @@ hyper2 = { version = "1", features = ["http1", "http2", "client"] }
 log = "0.4"
 mime = "0.3.17"
 percent-encoding = "2.3"
-tokio = { version = "1", default-features = false, features = ["net", "time"] }
+tokio = { version = "1", default-features = false, features = ["net", "time", "rt"] }
 pin-project-lite = "0.2.0"
 ipnet = "2.10.0"
 
diff --git a/src/tls/mimic/macros.rs b/src/tls/mimic/macros.rs
index 6618e497..f6edbe2e 100644
--- a/src/tls/mimic/macros.rs
+++ b/src/tls/mimic/macros.rs
@@ -150,9 +150,10 @@ macro_rules! impersonate_match {
     }
 }
 
+#[cfg(feature = "impersonate_str")]
 macro_rules! impl_from_str {
     ($(($variant:ident, $string:expr)),* $(,)?) => {
-        impl FromStr for Impersonate {
+        impl std::str::FromStr for Impersonate {
             type Err = String;
 
             fn from_str(s: &str) -> Result<Self, Self::Err> {
diff --git a/src/tls/mimic/mod.rs b/src/tls/mimic/mod.rs
index f8616af7..23d29dd6 100644
--- a/src/tls/mimic/mod.rs
+++ b/src/tls/mimic/mod.rs
@@ -10,7 +10,7 @@ use chrome::*;
 use firefox::*;
 use okhttp::*;
 use safari::*;
-use std::{fmt::Debug, str::FromStr};
+use std::fmt::Debug;
 use Impersonate::*;
 
 mod impersonate_imports {
@@ -169,6 +169,7 @@ pub enum Impersonate {
     Firefox133,
 }
 
+#[cfg(feature = "impersonate_str")]
 impl_from_str! {
     // Chrome
     (Chrome100, "chrome_100"),