diff --git a/bench_helpers/Cargo.lock b/bench_helpers/Cargo.lock
index b4cca6a..bfde671 100644
--- a/bench_helpers/Cargo.lock
+++ b/bench_helpers/Cargo.lock
@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "anes"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b46cbb362ab8752921c97e041f5e366ee6297bd428a31275b9fcf1e380f7299"
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -35,69 +41,77 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
-name = "bstr"
-version = "0.2.17"
+name = "cast"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba3569f383e8f1598449f1a423e72e99569137b47740b1da11ef19af3d5c3223"
+checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
+
+[[package]]
+name = "ciborium"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0c137568cc60b904a7724001b35ce2630fd00d5d84805fbb608ab89509d788f"
 dependencies = [
- "lazy_static",
- "memchr",
- "regex-automata",
+ "ciborium-io",
+ "ciborium-ll",
  "serde",
 ]
 
 [[package]]
-name = "bumpalo"
-version = "3.7.1"
+name = "ciborium-io"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9df67f7bf9ef8498769f994239c45613ef0c5899415fb58e9add412d2c1a538"
+checksum = "346de753af073cc87b52b2083a506b38ac176a44cfb05497b622e27be899b369"
 
 [[package]]
-name = "cast"
-version = "0.2.7"
+name = "ciborium-ll"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c24dab4283a142afa2fdca129b80ad2c6284e073930f964c3a1293c225ee39a"
+checksum = "213030a2b5a4e0c0892b6652260cf6ccac84827b83a85a534e178e3906c4cf1b"
 dependencies = [
- "rustc_version",
+ "ciborium-io",
+ "half",
 ]
 
-[[package]]
-name = "cfg-if"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
-
 [[package]]
 name = "clap"
-version = "2.33.3"
+version = "3.2.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37e58ac78573c40708d45522f0d80fa2f01cc4f9b4e2bf749807255454312002"
+checksum = "71655c45cb9845d3270c9d6df84ebe72b4dad3c2ba3f7023ad47c144e4e473a5"
 dependencies = [
  "bitflags",
+ "clap_lex",
+ "indexmap",
  "textwrap",
- "unicode-width",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2850f2f5a82cbf437dd5af4d49848fbdfc27c157c3d010345776f952765261c5"
+dependencies = [
+ "os_str_bytes",
 ]
 
 [[package]]
 name = "criterion"
-version = "0.3.5"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1604dafd25fba2fe2d5895a9da139f8dc9b319a5fe5354ca137cbbce4e178d10"
+checksum = "e7c76e09c1aae2bc52b3d2f29e13c6572553b30c4aa1b8a49fd70de6412654cb"
 dependencies = [
+ "anes",
  "atty",
  "cast",
+ "ciborium",
  "clap",
  "criterion-plot",
- "csv",
  "itertools",
  "lazy_static",
  "num-traits",
  "oorandom",
- "plotters",
- "rayon",
  "regex",
  "serde",
- "serde_cbor",
  "serde_derive",
  "serde_json",
  "tinytemplate",
@@ -106,80 +120,14 @@ dependencies = [
 
 [[package]]
 name = "criterion-plot"
-version = "0.4.4"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d00996de9f2f7559f7f4dc286073197f83e92256a59ed395f9aac01fe717da57"
+checksum = "6b50826342786a51a89e2da3a28f1c32b06e387201bc2d19791f622c673706b1"
 dependencies = [
  "cast",
  "itertools",
 ]
 
-[[package]]
-name = "crossbeam-channel"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06ed27e177f16d65f0f0c22a213e17c696ace5dd64b14258b52f9417ccb52db4"
-dependencies = [
- "cfg-if",
- "crossbeam-utils",
-]
-
-[[package]]
-name = "crossbeam-deque"
-version = "0.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6455c0ca19f0d2fbf751b908d5c55c1f5cbc65e03c4225427254b46890bdde1e"
-dependencies = [
- "cfg-if",
- "crossbeam-epoch",
- "crossbeam-utils",
-]
-
-[[package]]
-name = "crossbeam-epoch"
-version = "0.9.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ec02e091aa634e2c3ada4a392989e7c3116673ef0ac5b72232439094d73b7fd"
-dependencies = [
- "cfg-if",
- "crossbeam-utils",
- "lazy_static",
- "memoffset",
- "scopeguard",
-]
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.8.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bf124c720b7686e3c2663cf54062ab0f68a88af2fb6a030e87e30bf721fcb38"
-dependencies = [
- "cfg-if",
- "lazy_static",
-]
-
-[[package]]
-name = "csv"
-version = "1.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "22813a6dc45b335f9bade10bf7271dc477e81113e89eb251a0bc2a8a81c536e1"
-dependencies = [
- "bstr",
- "csv-core",
- "itoa",
- "ryu",
- "serde",
-]
-
-[[package]]
-name = "csv-core"
-version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b2466559f260f48ad25fe6317b3c8dac77b5bdb5763ac7d9d6103530663bc90"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "either"
 version = "1.6.1"
@@ -192,6 +140,12 @@ version = "1.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "62aca2aba2d62b4a7f5b33f3712cb1b0692779a56fb510499d5c0aa594daeaf3"
 
+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
 [[package]]
 name = "hermit-abi"
 version = "0.1.19"
@@ -201,6 +155,16 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "indexmap"
+version = "1.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1885e79c1fc4b10f0e172c475f458b7f7b93061064d98c3293e98c5ba0c8b399"
+dependencies = [
+ "autocfg",
+ "hashbrown",
+]
+
 [[package]]
 name = "itertools"
 version = "0.10.1"
@@ -216,15 +180,6 @@ version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd25036021b0de88a0aff6b850051563c6516d0bf53f8638938edbb9de732736"
 
-[[package]]
-name = "js-sys"
-version = "0.3.55"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7cc9ffccd38c451a86bf13657df244e9c3f37493cce8e5e21e940963777acc84"
-dependencies = [
- "wasm-bindgen",
-]
-
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -237,30 +192,6 @@ version = "0.2.103"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd8f7255a17a627354f321ef0055d63b898c6fb27eff628af4d1b66b7331edf6"
 
-[[package]]
-name = "log"
-version = "0.4.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
-dependencies = [
- "cfg-if",
-]
-
-[[package]]
-name = "memchr"
-version = "2.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"
-
-[[package]]
-name = "memoffset"
-version = "0.6.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59accc507f1338036a0477ef61afdae33cde60840f4dfe481319ce3ad116ddf9"
-dependencies = [
- "autocfg",
-]
-
 [[package]]
 name = "num-traits"
 version = "0.2.14"
@@ -270,16 +201,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "num_cpus"
-version = "1.13.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05499f3756671c15885fee9034446956fff3f243d6077b91e5767df161f766b3"
-dependencies = [
- "hermit-abi",
- "libc",
-]
-
 [[package]]
 name = "oorandom"
 version = "11.1.3"
@@ -287,32 +208,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
 
 [[package]]
-name = "plotters"
-version = "0.3.1"
+name = "os_str_bytes"
+version = "6.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32a3fd9ec30b9749ce28cd91f255d569591cdf937fe280c312143e3c4bad6f2a"
-dependencies = [
- "num-traits",
- "plotters-backend",
- "plotters-svg",
- "wasm-bindgen",
- "web-sys",
-]
-
-[[package]]
-name = "plotters-backend"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d88417318da0eaf0fdcdb51a0ee6c3bed624333bff8f946733049380be67ac1c"
-
-[[package]]
-name = "plotters-svg"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "521fa9638fa597e1dc53e9412a4f9cefb01187ee1f7413076f9e6749e2885ba9"
-dependencies = [
- "plotters-backend",
-]
+checksum = "9b7820b9daea5457c9f21c69448905d723fbd21136ccf521748f23fd49e723ee"
 
 [[package]]
 name = "proc-macro2"
@@ -332,31 +231,6 @@ dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "rayon"
-version = "1.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c06aca804d41dbc8ba42dfd964f0d01334eceb64314b9ecf7c5fad5188a06d90"
-dependencies = [
- "autocfg",
- "crossbeam-deque",
- "either",
- "rayon-core",
-]
-
-[[package]]
-name = "rayon-core"
-version = "1.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d78120e2c850279833f1dd3582f730c4ab53ed95aeaaaa862a2a5c71b1656d8e"
-dependencies = [
- "crossbeam-channel",
- "crossbeam-deque",
- "crossbeam-utils",
- "lazy_static",
- "num_cpus",
-]
-
 [[package]]
 name = "regex"
 version = "1.5.6"
@@ -366,27 +240,12 @@ dependencies = [
  "regex-syntax",
 ]
 
-[[package]]
-name = "regex-automata"
-version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
-
 [[package]]
 name = "regex-syntax"
 version = "0.6.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49b3de9ec5dc0a3417da371aab17d729997c15010e7fd24ff707773a33bddb64"
 
-[[package]]
-name = "rustc_version"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
-dependencies = [
- "semver",
-]
-
 [[package]]
 name = "ryu"
 version = "1.0.5"
@@ -402,18 +261,6 @@ dependencies = [
  "winapi-util",
 ]
 
-[[package]]
-name = "scopeguard"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
-
-[[package]]
-name = "semver"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "568a8e6258aa33c13358f81fd834adb854c6f7c9468520910a9b1e8fac068012"
-
 [[package]]
 name = "serde"
 version = "1.0.126"
@@ -423,16 +270,6 @@ dependencies = [
  "serde_derive",
 ]
 
-[[package]]
-name = "serde_cbor"
-version = "0.11.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2bef2ebfde456fb76bbcf9f59315333decc4fda0b2b44b420243c11e0f5ec1f5"
-dependencies = [
- "half",
- "serde",
-]
-
 [[package]]
 name = "serde_derive"
 version = "1.0.126"
@@ -468,12 +305,9 @@ dependencies = [
 
 [[package]]
 name = "textwrap"
-version = "0.11.0"
+version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
-dependencies = [
- "unicode-width",
-]
+checksum = "222a222a5bfe1bba4a77b45ec488a741b3cb8872e5e499451fd7d0129c9c7c3d"
 
 [[package]]
 name = "tinytemplate"
@@ -485,12 +319,6 @@ dependencies = [
  "serde_json",
 ]
 
-[[package]]
-name = "unicode-width"
-version = "0.1.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
-
 [[package]]
 name = "unicode-xid"
 version = "0.2.2"
@@ -508,70 +336,6 @@ dependencies = [
  "winapi-util",
 ]
 
-[[package]]
-name = "wasm-bindgen"
-version = "0.2.78"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "632f73e236b219150ea279196e54e610f5dbafa5d61786303d4da54f84e47fce"
-dependencies = [
- "cfg-if",
- "wasm-bindgen-macro",
-]
-
-[[package]]
-name = "wasm-bindgen-backend"
-version = "0.2.78"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a317bf8f9fba2476b4b2c85ef4c4af8ff39c3c7f0cdfeed4f82c34a880aa837b"
-dependencies = [
- "bumpalo",
- "lazy_static",
- "log",
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-macro"
-version = "0.2.78"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d56146e7c495528bf6587663bea13a8eb588d39b36b679d83972e1a2dbbdacf9"
-dependencies = [
- "quote",
- "wasm-bindgen-macro-support",
-]
-
-[[package]]
-name = "wasm-bindgen-macro-support"
-version = "0.2.78"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7803e0eea25835f8abdc585cd3021b3deb11543c6fe226dcd30b228857c5c5ab"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-backend",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-shared"
-version = "0.2.78"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0237232789cf037d5480773fe568aac745bfe2afbc11a863e97901780a6b47cc"
-
-[[package]]
-name = "web-sys"
-version = "0.3.55"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38eb105f1c59d9eaa6b5cdc92b859d85b926e82cb2e0945cd0c9259faa6fe9fb"
-dependencies = [
- "js-sys",
- "wasm-bindgen",
-]
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
diff --git a/bindings/python/Cargo.toml b/bindings/python/Cargo.toml
index 62d86e9..387e44c 100644
--- a/bindings/python/Cargo.toml
+++ b/bindings/python/Cargo.toml
@@ -9,6 +9,7 @@ description = "JSON schema validaton library"
 repository = "https://github.com/Stranger6667/jsonschema-rs"
 keywords = ["jsonschema", "validation"]
 categories = ["web-programming"]
+rust-version = "1.56.1"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [lib]
diff --git a/jsonschema/Cargo.toml b/jsonschema/Cargo.toml
index 7ac22b0..b19c68c 100644
--- a/jsonschema/Cargo.toml
+++ b/jsonschema/Cargo.toml
@@ -9,6 +9,7 @@ name = "jsonschema"
 readme = "../README.md"
 repository = "https://github.com/Stranger6667/jsonschema-rs"
 version = "0.16.1"
+rust-version = "1.56.1"
 
 categories = ["web-programming"]
 
diff --git a/jsonschema/src/compilation/mod.rs b/jsonschema/src/compilation/mod.rs
index b4a2d83..40b19a9 100644
--- a/jsonschema/src/compilation/mod.rs
+++ b/jsonschema/src/compilation/mod.rs
@@ -136,9 +136,9 @@ impl JSONSchema {
 
 /// Compile JSON schema into a tree of validators.
 #[inline]
-pub(crate) fn compile_validators<'a, 'c>(
+pub(crate) fn compile_validators<'a>(
     schema: &'a Value,
-    context: &'c CompilationContext,
+    context: &CompilationContext,
 ) -> Result<SchemaNode, ValidationError<'a>> {
     let context = context.push(schema)?;
     let relative_path = context.clone().into_pointer();
diff --git a/jsonschema/src/resolver.rs b/jsonschema/src/resolver.rs
index 12700e9..7c81342 100644
--- a/jsonschema/src/resolver.rs
+++ b/jsonschema/src/resolver.rs
@@ -160,7 +160,7 @@ impl Resolver {
     ///   - the root document (`DEFAULT_ROOT_URL`) case;
     ///   - named subschema that is stored in `self.schemas`;
     ///   - document from a remote location;
-    fn resolve_url<'a>(&'a self, url: &Url, orig_ref: &str) -> Result<Arc<Value>, ValidationError> {
+    fn resolve_url(&self, url: &Url, orig_ref: &str) -> Result<Arc<Value>, ValidationError<'_>> {
         match url.as_str() {
             DEFAULT_ROOT_URL => Ok(self.root_schema.clone()),
             url_str => match self.schemas.get(url_str) {
@@ -311,10 +311,10 @@ impl<'a> MaybeReplaceExt<'a> for Cow<'a, str> {
 }
 
 /// Based on `serde_json`, but tracks folders in the traversed documents.
-pub(crate) fn pointer<'a, 'b>(
+pub(crate) fn pointer<'a>(
     draft: Draft,
     document: &'a Value,
-    pointer: &'b str,
+    pointer: &str,
 ) -> Option<(Vec<&'a str>, &'a Value)> {
     if !pointer.starts_with('/') {
         return None;