diff --git a/Cargo.toml b/Cargo.toml
index 43611de..b01722d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,9 +17,9 @@ categories = [
 ssri = "7.0.0"
 hex = "0.4.3"
 tempfile = "3.2.0"
-sha-1 = "0.9.8"
-sha2 = "0.9.8"
-digest = "0.9.0"
+sha-1 = "0.10.0"
+sha2 = "0.10.1"
+digest = "0.10.2"
 serde_json = "1.0.68"
 serde = "1.0.130"
 serde_derive = "1.0.130"
@@ -28,7 +28,7 @@ either = "1.6.1"
 async-std = { version = "1.10.0", features = ["unstable"] }
 thiserror = "1.0.29"
 futures = "0.3.17"
-memmap2 = "0.5"
+memmap = "0.7.0"
 
 [dev-dependencies]
 async-attributes = "1.1.2"
diff --git a/src/content/write.rs b/src/content/write.rs
index 4365353..7861525 100644
--- a/src/content/write.rs
+++ b/src/content/write.rs
@@ -9,7 +9,7 @@ use async_std::future::Future;
 use async_std::task::{self, Context, JoinHandle, Poll};
 use futures::io::AsyncWrite;
 use futures::prelude::*;
-use memmap2::MmapMut;
+use memmap::MmapMut;
 use ssri::{Algorithm, Integrity, IntegrityOpts};
 use tempfile::NamedTempFile;