diff --git a/Cargo.lock b/Cargo.lock
index aa272f5..d0326e4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,14 +4,15 @@ version = 3
 
 [[package]]
 name = "afl"
-version = "0.10.1"
+version = "0.12.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d16d691836db1a0927dab30b21add058acec42e177534128e7f00a7cf60bafc2"
+checksum = "3a914d2e0f713b59acd9b2a85cd2f0b651e2df3ae1ade2bb18c56a97cdb51177"
 dependencies = [
- "cc",
- "clap 2.34.0",
+ "clap 4.0.18",
+ "fs_extra",
  "libc",
- "rustc_version 0.3.3",
+ "rustc_version",
+ "tempfile",
  "xdg",
 ]
 
@@ -303,7 +304,7 @@ dependencies = [
  "atty",
  "bitflags",
  "clap_derive",
- "clap_lex",
+ "clap_lex 0.2.4",
  "indexmap",
  "once_cell",
  "strsim 0.10.0",
@@ -311,6 +312,20 @@ dependencies = [
  "textwrap 0.15.0",
 ]
 
+[[package]]
+name = "clap"
+version = "4.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "335867764ed2de42325fafe6d18b8af74ba97ee0c590fa016f157535b42ab04b"
+dependencies = [
+ "atty",
+ "bitflags",
+ "clap_lex 0.3.0",
+ "once_cell",
+ "strsim 0.10.0",
+ "termcolor",
+]
+
 [[package]]
 name = "clap_derive"
 version = "3.2.7"
@@ -333,6 +348,15 @@ dependencies = [
  "os_str_bytes",
 ]
 
+[[package]]
+name = "clap_lex"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d4198f73e42b4936b35b5bb248d81d2b595ecb170da0bac7655c54eedfa8da8"
+dependencies = [
+ "os_str_bytes",
+]
+
 [[package]]
 name = "convert_case"
 version = "0.4.0"
@@ -359,7 +383,7 @@ dependencies = [
  "convert_case",
  "proc-macro2",
  "quote",
- "rustc_version 0.4.0",
+ "rustc_version",
  "syn",
 ]
 
@@ -411,6 +435,21 @@ dependencies = [
  "termcolor",
 ]
 
+[[package]]
+name = "fastrand"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7a407cfaa3385c4ae6b23e84623d48c2798d06e3e6a1878f7f59f17b3f86499"
+dependencies = [
+ "instant",
+]
+
+[[package]]
+name = "fs_extra"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2022715d62ab30faffd124d40b76f4134a550a87792276512b18d63272333394"
+
 [[package]]
 name = "funty"
 version = "2.0.0"
@@ -590,6 +629,15 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "instant"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "itertools"
 version = "0.10.3"
@@ -619,9 +667,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.126"
+version = "0.2.137"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
+checksum = "fc7fcc620a3bff7cdd7a365be3376c97191aeaccc2a603e600951e452615bf89"
 
 [[package]]
 name = "libfuzzer-sys"
@@ -757,15 +805,6 @@ dependencies = [
  "windows-sys",
 ]
 
-[[package]]
-name = "pest"
-version = "2.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10f4872ae94d7b90ae48754df22fd42ad52ce740b8f370b03da4835417403e53"
-dependencies = [
- "ucd-trie",
-]
-
 [[package]]
 name = "pin-project-lite"
 version = "0.2.9"
@@ -910,12 +949,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
 
 [[package]]
-name = "rustc_version"
-version = "0.3.3"
+name = "remove_dir_all"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0dfe2087c51c460008730de8b57e6a320782fbfb312e1f4d520e6c6fae155ee"
+checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
 dependencies = [
- "semver 0.11.0",
+ "winapi",
 ]
 
 [[package]]
@@ -924,7 +963,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
 dependencies = [
- "semver 1.0.12",
+ "semver",
 ]
 
 [[package]]
@@ -939,30 +978,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
-[[package]]
-name = "semver"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f301af10236f6df4160f7c3f04eec6dbc70ace82d23326abad5edee88801c6b6"
-dependencies = [
- "semver-parser",
-]
-
 [[package]]
 name = "semver"
 version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2333e6df6d6598f2b1974829f853c2b4c5f4a6e503c10af918081aa6f8564e1"
 
-[[package]]
-name = "semver-parser"
-version = "0.10.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "00b0bef5b7f9e0df16536d3961cfb6e84331c065b4066afb39768d0e319411f7"
-dependencies = [
- "pest",
-]
-
 [[package]]
 name = "serde"
 version = "1.0.140"
@@ -1085,6 +1106,20 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
 
+[[package]]
+name = "tempfile"
+version = "3.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5cdb1ef4eaeeaddc8fbd371e5017057064af0911902ef36b39801f67cc6d79e4"
+dependencies = [
+ "cfg-if",
+ "fastrand",
+ "libc",
+ "redox_syscall",
+ "remove_dir_all",
+ "winapi",
+]
+
 [[package]]
 name = "termcolor"
 version = "1.1.3"
@@ -1192,12 +1227,6 @@ version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dcf81ac59edc17cc8697ff311e8f5ef2d99fcbd9817b34cec66f90b6c3dfd987"
 
-[[package]]
-name = "ucd-trie"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89570599c4fe5585de2b388aab47e99f7fa4e9238a1399f707a02e356058141c"
-
 [[package]]
 name = "unicode-ident"
 version = "1.0.2"
diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index 1325ffc..1034b35 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -22,7 +22,7 @@ structopt = "0.3.21"
 tokio = { version = "1.6.1", features = ["rt"] }
 
 libfuzzer-sys = { version = "0.4.2", optional = true }
-afl = { version = "0.10.1", optional = true }
+afl = { version = "0.12.10", optional = true }
 
 [features]
 default = []