diff --git a/Cargo.toml b/Cargo.toml
index 8144b9e53..594dedae0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ once_cell = "1.7.2"
 regex ={ version = "1.5.4", default-features = false, features = ["std"] }
 tantivy-fst = "0.3"
 memmap2 = {version = "0.5", optional=true}
-lz4_flex = { version = "0.9.0", default-features = false, features = ["checked-decode"], optional = true }
+lz4_flex = { version = "=0.9.0", default-features = false, features = ["checked-decode"], optional = true }
 brotli = { version = "3.3", optional = true }
 snap = { version = "1.0.5", optional = true }
 tempfile = { version = "3.2", optional = true }