diff --git a/Cargo.lock b/Cargo.lock
index 5159ef6ca..9b8e95a20 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2448,9 +2448,9 @@ dependencies = [
 
 [[package]]
 name = "memmap2"
-version = "0.3.1"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "00b6c2ebff6180198788f5db08d7ce3bc1d0b617176678831a7510825973e357"
+checksum = "de5d3112c080d58ce560081baeaab7e1e864ca21795ddbf533d5b1842bb1ecf8"
 dependencies = [
  "libc",
 ]
@@ -4663,7 +4663,7 @@ dependencies = [
  "bv",
  "generic-array 0.14.4",
  "log 0.4.14",
- "memmap2 0.3.1",
+ "memmap2 0.4.0",
  "rustc_version 0.4.0",
  "serde",
  "serde_derive",
@@ -5377,7 +5377,7 @@ dependencies = [
  "itertools 0.10.1",
  "lazy_static",
  "log 0.4.14",
- "memmap2 0.3.1",
+ "memmap2 0.4.0",
  "num_cpus",
  "ouroboros",
  "rand 0.7.3",
@@ -5439,7 +5439,7 @@ dependencies = [
  "lazy_static",
  "libsecp256k1 0.6.0",
  "log 0.4.14",
- "memmap2 0.3.1",
+ "memmap2 0.4.0",
  "num-derive",
  "num-traits",
  "pbkdf2 0.9.0",
diff --git a/frozen-abi/Cargo.toml b/frozen-abi/Cargo.toml
index 3e611a809..4da8990a1 100644
--- a/frozen-abi/Cargo.toml
+++ b/frozen-abi/Cargo.toml
@@ -22,7 +22,7 @@ thiserror = "1.0"
 [target.'cfg(not(target_arch = "bpf"))'.dependencies]
 solana-logger = { path = "../logger", version = "=1.8.0" }
 generic-array = { version = "0.14.4", default-features = false, features = ["serde", "more_lengths"]}
-memmap2 = "0.3.1"
+memmap2 = "0.4.0"
 
 [build-dependencies]
 rustc_version = "0.4"
diff --git a/programs/bpf/Cargo.lock b/programs/bpf/Cargo.lock
index dd4b45db1..013b86abc 100644
--- a/programs/bpf/Cargo.lock
+++ b/programs/bpf/Cargo.lock
@@ -1483,9 +1483,9 @@ dependencies = [
 
 [[package]]
 name = "memmap2"
-version = "0.3.1"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "00b6c2ebff6180198788f5db08d7ce3bc1d0b617176678831a7510825973e357"
+checksum = "de5d3112c080d58ce560081baeaab7e1e864ca21795ddbf533d5b1842bb1ecf8"
 dependencies = [
  "libc",
 ]
@@ -2960,7 +2960,7 @@ dependencies = [
  "bv",
  "generic-array 0.14.4",
  "log",
- "memmap2 0.3.1",
+ "memmap2 0.4.0",
  "rustc_version 0.4.0",
  "serde",
  "serde_derive",
@@ -3205,7 +3205,7 @@ dependencies = [
  "itertools 0.10.1",
  "lazy_static",
  "log",
- "memmap2 0.3.1",
+ "memmap2 0.4.0",
  "num_cpus",
  "ouroboros",
  "rand 0.7.3",
@@ -3258,7 +3258,7 @@ dependencies = [
  "lazy_static",
  "libsecp256k1 0.6.0",
  "log",
- "memmap2 0.3.1",
+ "memmap2 0.4.0",
  "num-derive",
  "num-traits",
  "pbkdf2 0.9.0",
diff --git a/runtime/Cargo.toml b/runtime/Cargo.toml
index 8f6c8af28..393df57b7 100644
--- a/runtime/Cargo.toml
+++ b/runtime/Cargo.toml
@@ -24,7 +24,7 @@ fnv = "1.0.7"
 itertools = "0.10.1"
 lazy_static = "1.4.0"
 log = "0.4.14"
-memmap2 = "0.3.1"
+memmap2 = "0.4.0"
 num_cpus = "1.13.0"
 ouroboros = "0.10.1"
 rand = "0.7.0"
diff --git a/sdk/Cargo.toml b/sdk/Cargo.toml
index b871229a2..46e71c107 100644
--- a/sdk/Cargo.toml
+++ b/sdk/Cargo.toml
@@ -58,7 +58,7 @@ itertools =  "0.10.1"
 lazy_static = "1.4.0"
 libsecp256k1 = { version = "0.6.0", optional = true }
 log = "0.4.14"
-memmap2 = { version = "0.3.1", optional = true }
+memmap2 = { version = "0.4.0", optional = true }
 num-derive = "0.3"
 num-traits = "0.2"
 pbkdf2 = { version = "0.9.0", default-features = false }