diff --git a/Cargo.toml b/Cargo.toml
index c19e6da..b197c65 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,9 @@ edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[dependencies]
+rand = "^0.8"
+
 [dependencies.tokio]
 version = "^1.0"
 features = ["net", "time"]
diff --git a/src/lib.rs b/src/lib.rs
index d48cf12..e4dc09c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -44,15 +44,9 @@ use tokio::{
 pub const SESSION_ID_MASK: u32 = 0x0F0F0F0F;
 const REQUEST_HEADER: [u8; 2] = [0xFE, 0xFD];
 
-static mut SESSION_ID_COUNTER: u16 = 0;
-
 fn gen_session_id() -> u32 {
-    unsafe {
-        SESSION_ID_COUNTER = SESSION_ID_COUNTER.wrapping_add(1);
-    }
-
     let mut session_id_bytes = [0; 4];
-    for (i, b) in unsafe { SESSION_ID_COUNTER }.to_be_bytes().iter().enumerate() {
+    for (i, b) in rand::random::<u16>().to_be_bytes().iter().enumerate() {
         session_id_bytes[i * 2] = b >> 4;
         session_id_bytes[i * 2 + 1] = b & 0x0F;
     }