diff --git a/libafl/Cargo.toml b/libafl/Cargo.toml
index 9cc07d9f80..5fa664f91f 100644
--- a/libafl/Cargo.toml
+++ b/libafl/Cargo.toml
@@ -76,7 +76,7 @@ wait-timeout = { version = "0.2", optional = true } # used by CommandExecutor to
 z3 = { version = "0.11", features = ["static-link-z3"], optional = true } # for concolic mutation
 
 # AGPL
-grammartec = { git = "https://github.com/nautilus-fuzz/nautilus", version = "0.1.0", optional = true }
+grammartec = { git = "https://github.com/nautilus-fuzz/nautilus", rev = "1d9d217", version = "0.1.0", optional = true }
 
 [target.'cfg(unix)'.dependencies]
 libc = "0.2" # For (*nix) libc