diff --git a/2021/Cargo.toml b/2021/Cargo.toml
index c49400f..0f16290 100644
--- a/2021/Cargo.toml
+++ b/2021/Cargo.toml
@@ -6,3 +6,7 @@ edition = "2021"
 
 [dependencies]
 clap = "3.0.0-beta.5"
+
+[profile.release]
+# Keep debug information in release for better flamegraphs
+debug = true