diff --git a/Cargo.toml b/Cargo.toml
index 73003f6..542335d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2021"
 ark-serialize = { version = "0.4.0", default-features = false }
 bincode = "1"
 blitzar = { version = "3.1.0", default-features = false, optional = true }
-indexmap = "2.4.0"
+indexmap = { version = "2.1" }
 curve25519-dalek = { version = "4", optional = true }
 proof-of-sql = { version = "0.16.0", default-features = false }
 proof-of-sql-parser = { version = "0.16.0" }