diff --git a/Cargo.lock b/Cargo.lock
index 89ca8fc..80ed202 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1415,6 +1415,7 @@ dependencies = [
  "hickory-resolver",
  "http",
  "httpdate",
+ "itoa",
  "log",
  "maxminddb",
  "mimalloc",
diff --git a/Cargo.toml b/Cargo.toml
index 0cdcea4..addaa10 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,6 +9,7 @@ publish = false
 async-trait = "=0.1.89"
 color-eyre = "=0.6.5"
 compact_str = { version = "=0.9.0", features = ["serde"] }
+itoa = "=1.0.16"
 crossterm = { version = "=0.28.1", default-features = false, features = [
     "event-stream",
     "windows",
diff --git a/src/proxy.rs b/src/proxy.rs
index bafe436..381a017 100644
--- a/src/proxy.rs
+++ b/src/proxy.rs
@@ -1,5 +1,4 @@
 use std::{
-    fmt::Write as _,
     hash::{Hash, Hasher},
     str::FromStr,
     sync::Arc,
@@ -139,16 +138,22 @@ impl Proxy {
         let mut s = compact_str::CompactString::const_new("");
 
         if include_protocol {
-            write!(s, "{}://", self.protocol.as_str()).unwrap();
+            s.push_str(self.protocol.as_str());
+            s.push_str("://");
         }
 
         if let (Some(username), Some(password)) =
             (&self.username, &self.password)
         {
-            write!(s, "{username}:{password}@").unwrap();
+            s.push_str(username);
+            s.push(':');
+            s.push_str(password);
+            s.push('@');
         }
 
-        write!(s, "{}:{}", self.host, self.port).unwrap();
+        s.push_str(&self.host);
+        s.push(':');
+        s.push_str(itoa::Buffer::new().format(self.port));
 
         s
     }
diff --git a/src/utils.rs b/src/utils.rs
index 608325f..67c2793 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -32,7 +32,8 @@ pub trait CompactStrJoin: Iterator {
                 );
                 write!(&mut result, "{first_elt}").unwrap();
                 for elt in self {
-                    write!(&mut result, "{sep}{elt}").unwrap();
+                    result.push_str(sep);
+                    write!(&mut result, "{elt}").unwrap();
                 }
                 result
             },