diff --git a/app/rust/Cargo.lock b/app/rust/Cargo.lock
index b3d425b..62f2e9c 100644
--- a/app/rust/Cargo.lock
+++ b/app/rust/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "aho-corasick"
@@ -90,7 +90,7 @@ checksum = "4a9b85542f99a2dfa2a1b8e192662741c9859a846b296bef1c92ef9b58b5a216"
 dependencies = [
  "byteorder",
  "digest 0.8.1",
- "rand_core",
+ "rand_core 0.5.1",
  "subtle",
  "zeroize",
 ]
@@ -103,7 +103,7 @@ checksum = "90f9d052967f590a76e62eb387bd0bbb1b000182c3cefe5364db6b7211651bc0"
 dependencies = [
  "byteorder",
  "digest 0.9.0",
- "rand_core",
+ "rand_core 0.5.1",
  "subtle",
  "zeroize",
 ]
@@ -253,7 +253,7 @@ checksum = "4e261cf0f8b3c42ded9f7d2bb59dea03aa52bc8a1cbc7482f9fc3fd1229d3b42"
 dependencies = [
  "byteorder",
  "keccak",
- "rand_core",
+ "rand_core 0.5.1",
  "zeroize",
 ]
 
@@ -269,12 +269,6 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "de96540e0ebde571dc55c73d60ef407c653844e6f9a1e2fdbd40c07b9252d812"
 
-[[package]]
-name = "ppv-lite86"
-version = "0.2.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
-
 [[package]]
 name = "proc-macro-hack"
 version = "0.5.20+deprecated"
@@ -307,23 +301,11 @@ dependencies = [
 
 [[package]]
 name = "rand"
-version = "0.7.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a6b1679d49b24bbfe0c803429aa1874472f50d9b363131f0e89fc356b544d03"
-dependencies = [
- "rand_chacha",
- "rand_core",
- "rand_hc",
-]
-
-[[package]]
-name = "rand_chacha"
-version = "0.2.2"
+version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f4c8ed856279c9737206bf725bf36935d8666ead7aa69b52be55af369d193402"
+checksum = "5ca0ecfa931c29007047d1bc58e623ab12e5590e8c7cc53200d5202b69266d8a"
 dependencies = [
- "ppv-lite86",
- "rand_core",
+ "rand_core 0.6.4",
 ]
 
 [[package]]
@@ -333,13 +315,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
 
 [[package]]
-name = "rand_hc"
-version = "0.2.0"
+name = "rand_core"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
-dependencies = [
- "rand_core",
-]
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 
 [[package]]
 name = "regex"
@@ -397,7 +376,7 @@ dependencies = [
  "arrayvec",
  "curve25519-dalek 2.1.3",
  "merlin",
- "rand_core",
+ "rand_core 0.5.1",
  "sha2",
  "subtle",
  "zeroize",
diff --git a/app/rust/Cargo.toml b/app/rust/Cargo.toml
index 08fcd9f..7c87c01 100644
--- a/app/rust/Cargo.toml
+++ b/app/rust/Cargo.toml
@@ -10,7 +10,7 @@ name = "rslib"
 crate-type = ["staticlib"]
 
 [dependencies]
-rand={ version = "0.7.3", default-features = false}
+rand={ version = "0.8.6", default-features = false}
 merlin = {version = "2.0.0", default-features=false}
 zeroize = {version = "1.1.1", default-features=false}