diff --git a/Cargo.toml b/Cargo.toml
index 1868f2643..4cc9700fe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,7 +23,7 @@ once_cell = "1.10.0"
 regex = { version = "1.5.5", default-features = false, features = ["std", "unicode"] }
 aho-corasick = "1.0"
 tantivy-fst = "0.4.0"
-memmap2 = { version = "0.7.1", optional = true }
+memmap2 = { version = "0.9.0", optional = true }
 lz4_flex = { version = "0.11", default-features = false, optional = true }
 zstd = { version = "0.12", optional = true, default-features = false }
 tempfile = { version = "3.3.0", optional = true }