diff --git a/Cargo.toml b/Cargo.toml
index 4ceaa95..23d0986 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,4 +6,4 @@ authors = ["stijnh <mail@stijnh.nl>"]
 [dependencies]
 rand="0.5.5"
 itertools="0.7.8"
-afl="0.4"
+afl="0.15.0"