diff --git a/tpke/Cargo.toml b/tpke/Cargo.toml
index e22bf8ec..89932d1f 100644
--- a/tpke/Cargo.toml
+++ b/tpke/Cargo.toml
@@ -13,7 +13,7 @@ hex = "=0.4.3"
 rand_core = "0.6"
 rand = "0.8"
 rayon = "1.5"
-thiserror = "=1.0.30"
+thiserror = "1.0.30"
 anyhow = "=1.0"
 blake2b_simd = "=1"
 miracl_core = "=2.3.0"