diff --git a/Cargo.lock b/Cargo.lock
index 08ff917554..089bd852a0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4726,21 +4726,11 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
-[[package]]
-name = "memmap"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6585fd95e7bb50d6cc31e20d4cf9afb4e2ba16c5846fc76793f11218da9c475b"
-dependencies = [
- "libc",
- "winapi 0.3.9",
-]
-
 [[package]]
 name = "memmap2"
-version = "0.5.5"
+version = "0.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3a79b39c93a7a5a27eeaf9a23b5ff43f1b9e0ad6b1cdd441140ae53c35613fc7"
+checksum = "95af15f345b17af2efc8ead6080fb8bc376f8cec1b35277b935637595fe77498"
 dependencies = [
  "libc",
 ]
@@ -4774,12 +4764,12 @@ dependencies = [
 [[package]]
 name = "merkletree"
 version = "0.22.0"
-source = "git+https://github.com/filecoin-project/merkletree?rev=05dd6de235e0dc36dbe05cb0849f35957fdca5be#05dd6de235e0dc36dbe05cb0849f35957fdca5be"
+source = "git+https://github.com/filecoin-project/merkletree?rev=3b1d98c43b341aed935152c5c1535c17d1b21d20#3b1d98c43b341aed935152c5c1535c17d1b21d20"
 dependencies = [
  "anyhow",
  "arrayref",
  "log 0.4.17",
- "memmap",
+ "memmap2",
  "positioned-io",
  "rayon",
  "serde 1.0.140",
diff --git a/cmd/merkle-generator/Cargo.toml b/cmd/merkle-generator/Cargo.toml
index aafbe20ff5..c7a785d7a3 100644
--- a/cmd/merkle-generator/Cargo.toml
+++ b/cmd/merkle-generator/Cargo.toml
@@ -12,7 +12,7 @@ bcs-ext = {package = "bcs-ext", path = "../../commons/bcs_ext"}
 clap = {version = "3", features = ["derive"]}
 csv = "~1"
 hex = "~0.4"
-merkletree = {git = "https://github.com/filecoin-project/merkletree", rev = "05dd6de235e0dc36dbe05cb0849f35957fdca5be"}
+merkletree = {git = "https://github.com/filecoin-project/merkletree", rev = "3b1d98c43b341aed935152c5c1535c17d1b21d20"}
 serde = "~1"
 serde_json = {version = "~1", features = ["arbitrary_precision"]}
 sha3 = "0.9.1"