diff --git a/Cargo.toml b/Cargo.toml
index 4211830f..c1d9faf1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ default-run = "bench_recursion"
 
 [dependencies]
 array_tool = "1.0.3"
-bimap = "0.4.0"
+bimap = "0.6.1"
 env_logger = "0.9.0"
 log = "0.4.14"
 itertools = "0.10.0"