diff --git a/Cargo.lock b/Cargo.lock
index a27bda8..a1f56c4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -605,12 +605,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "fuchsia-cprng"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
-
 [[package]]
 name = "futures"
 version = "0.3.25"
@@ -1392,9 +1386,9 @@ dependencies = [
 
 [[package]]
 name = "num"
-version = "0.1.42"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4703ad64153382334aa8db57c637364c322d3372e097840c72000dabdcf6156e"
+checksum = "43db66d1170d347f9a065114077f7dccb00c1b9478c89384490a3425279a4606"
 dependencies = [
  "num-bigint",
  "num-complex",
@@ -1406,24 +1400,22 @@ dependencies = [
 
 [[package]]
 name = "num-bigint"
-version = "0.1.44"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e63899ad0da84ce718c14936262a41cee2c79c981fc0a0e7c7beb47d5a07e8c1"
+checksum = "f93ab6289c7b344a8a9f60f88d80aa20032336fe78da341afc91c8a2341fc75f"
 dependencies = [
+ "autocfg",
  "num-integer",
  "num-traits",
- "rand 0.4.6",
- "rustc-serialize",
 ]
 
 [[package]]
 name = "num-complex"
-version = "0.1.43"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b288631d7878aaf59442cffd36910ea604ecd7745c36054328595114001c9656"
+checksum = "7ae39348c8bc5fbd7f40c727a9925f03517afd2ab27d46702108b6a7e5414c19"
 dependencies = [
  "num-traits",
- "rustc-serialize",
 ]
 
 [[package]]
@@ -1449,14 +1441,14 @@ dependencies = [
 
 [[package]]
 name = "num-rational"
-version = "0.1.42"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee314c74bd753fc86b4780aa9475da469155f3848473a261d2d18e35245a784e"
+checksum = "0638a1c9d0a3c0914158145bc76cff373a75a627e6ecbfb71cbe6f453a5a19b0"
 dependencies = [
+ "autocfg",
  "num-bigint",
  "num-integer",
  "num-traits",
- "rustc-serialize",
 ]
 
 [[package]]
@@ -1813,19 +1805,6 @@ dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "rand"
-version = "0.4.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "552840b97013b1a26992c11eac34bdd778e464601a4c2054b5f0bff7c6761293"
-dependencies = [
- "fuchsia-cprng",
- "libc",
- "rand_core 0.3.1",
- "rdrand",
- "winapi",
-]
-
 [[package]]
 name = "rand"
 version = "0.7.3"
@@ -1871,21 +1850,6 @@ dependencies = [
  "rand_core 0.6.4",
 ]
 
-[[package]]
-name = "rand_core"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
-dependencies = [
- "rand_core 0.4.2",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
-
 [[package]]
 name = "rand_core"
 version = "0.5.1"
@@ -1922,15 +1886,6 @@ dependencies = [
  "rand_core 0.5.1",
 ]
 
-[[package]]
-name = "rdrand"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
-dependencies = [
- "rand_core 0.3.1",
-]
-
 [[package]]
 name = "redox_syscall"
 version = "0.2.16"
@@ -2004,12 +1959,6 @@ dependencies = [
  "ordered-multimap",
 ]
 
-[[package]]
-name = "rustc-serialize"
-version = "0.3.24"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcf128d1287d2ea9d80910b5f1120d0b8eede3fbf1abe91c40d39ea7d51e6fda"
-
 [[package]]
 name = "rustix"
 version = "0.36.4"
@@ -2184,9 +2133,9 @@ checksum = "a507befe795404456341dfab10cef66ead4c041f62b8b11bbb92bffe5d0953e0"
 
 [[package]]
 name = "speculoos"
-version = "0.9.0"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bcff6a72e2ddfb09ce0064568857e70d3cf6f4342244ebb1f84fa6f89b16c26"
+checksum = "e8f81684bbc3005f83b5c0a9e03eb52c8257b15370d62dcedf548964d5bfae2d"
 dependencies = [
  "num",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 5ec91f5..1cbca92 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -42,7 +42,7 @@ required-features = ["clap"]
 
 [dev-dependencies]
 sealed_test = "1.0.0"
-speculoos = "0.9.0"
+speculoos = "0.10.0"
 cmd_lib = "1.3.0"
 pretty_assertions = "1.2.1"
 indoc = "1.0.6"