diff --git a/crates/rb-sys-env/src/ruby_version.rs b/crates/rb-sys-env/src/ruby_version.rs
index 9d30dccad..43a330ea4 100644
--- a/crates/rb-sys-env/src/ruby_version.rs
+++ b/crates/rb-sys-env/src/ruby_version.rs
@@ -2,7 +2,7 @@ use std::collections::HashMap;
 
 const COMPARABLE_RUBY_MAJORS: [u8; 4] = [1, 2, 3, 4];
 
-const COMPARABLE_RUBY_MINORS: [(u8, u8); 11] = [
+const COMPARABLE_RUBY_MINORS: [(u8, u8); 13] = [
     (2, 2),
     (2, 3),
     (2, 4),
@@ -14,6 +14,8 @@ const COMPARABLE_RUBY_MINORS: [(u8, u8); 11] = [
     (3, 2),
     (3, 3),
     (3, 4),
+    (4, 0),
+    (4, 1),
 ];
 
 /// The current Ruby version.
diff --git a/crates/rb-sys/build/main.rs b/crates/rb-sys/build/main.rs
index e95e6885e..9eb4f77d6 100644
--- a/crates/rb-sys/build/main.rs
+++ b/crates/rb-sys/build/main.rs
@@ -13,7 +13,7 @@ use std::{
 };
 use version::Version;
 
-const SUPPORTED_RUBY_VERSIONS: [Version; 11] = [
+const SUPPORTED_RUBY_VERSIONS: [Version; 12] = [
     Version::new(2, 3),
     Version::new(2, 4),
     Version::new(2, 5),
@@ -25,6 +25,7 @@ const SUPPORTED_RUBY_VERSIONS: [Version; 11] = [
     Version::new(3, 3),
     Version::new(3, 4),
     Version::new(4, 0),
+    Version::new(4, 1),
 ];
 
 fn main() {