diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index fde27a2..4b335ef 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -9,7 +9,7 @@ cargo-fuzz = true
 
 [dependencies]
 libfuzzer-sys = "0.4"
-num-bigint = "0.4"
+num-bigint = "0.5"
 num-traits = "0.2"
 bitrep = { path = "..", features = ["stats", "quantile"] }