diff --git a/test_support/src/lib.rs b/test_support/src/lib.rs
index a7470ba..5fbc3a3 100644
--- a/test_support/src/lib.rs
+++ b/test_support/src/lib.rs
@@ -11,7 +11,7 @@ use std::panic;
 use std::path::PathBuf;
 use std::time::{Duration, SystemTime};
 
-const DEFAULT_BUILDER: &str = "heroku/builder:22";
+const DEFAULT_BUILDER: &str = "heroku/builder:24";
 pub const PORT: u16 = 8080;
 pub const DEFAULT_RETRIES: u32 = 10;
 pub const DEFAULT_RETRY_DELAY: Duration = Duration::from_secs(1);