diff --git a/core/Cargo.toml b/core/Cargo.toml
index 43b442c..4d62636 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -11,7 +11,7 @@ crate-type = ["rlib"]
 lalrpop = { version = "0.19.9", features = ["lexer"] }
 
 [dependencies]
-lalrpop-util = "0.19.9"
+lalrpop-util = { version = "0.19.9", features = ["lexer"] }
 proc-macro2 = { version = "1.0", features = ["span-locations"] }
 downcast = "0.11"
 quote = "1.0"