diff --git a/src/error.rs b/src/error.rs
index c5ebd2f..99c9eae 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -22,8 +22,13 @@ pub enum Error {
     /// Invalid number of arguments for the expression
     #[error("invalid number of arguments for {name}: {actual} (expected {expected})")]
     InvalidNumberOfArguments {
+        /// The name of the expression or operation
         name: String,
+
+        /// The actual number of arguments
         actual: usize,
+
+        /// The number of arguments the expression or operation expected
         expected: usize,
     },
 
diff --git a/src/expr.rs b/src/expr.rs
index ef6bc86..49c6e85 100644
--- a/src/expr.rs
+++ b/src/expr.rs
@@ -19,6 +19,7 @@ use std::str::FromStr;
 /// and use [Expr::is_valid] to check validity.
 #[derive(Debug, Serialize, Deserialize, Clone)]
 #[serde(untagged)]
+#[allow(missing_docs)]
 pub enum Expr {
     Operation { op: String, args: Vec<Box<Expr>> },
     Interval { interval: Vec<Box<Expr>> },
diff --git a/src/lib.rs b/src/lib.rs
index e30df47..d0bb515 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,33 @@
 //! Parse and transform [Common Query Language 2 (CQL2)](https://docs.ogc.org/is/21-065r2/21-065r2.html).
 
-#![deny(unused_crate_dependencies)]
+#![warn(missing_docs)]
+#![deny(
+    elided_lifetimes_in_paths,
+    explicit_outlives_requirements,
+    keyword_idents,
+    macro_use_extern_crate,
+    meta_variable_misuse,
+    missing_abi,
+    missing_debug_implementations,
+    non_ascii_idents,
+    noop_method_call,
+    rust_2021_incompatible_closure_captures,
+    rust_2021_incompatible_or_patterns,
+    rust_2021_prefixes_incompatible_syntax,
+    rust_2021_prelude_collisions,
+    single_use_lifetimes,
+    trivial_casts,
+    trivial_numeric_casts,
+    unreachable_pub,
+    unsafe_code,
+    unsafe_op_in_unsafe_fn,
+    unused_crate_dependencies,
+    unused_extern_crates,
+    unused_import_braces,
+    unused_lifetimes,
+    unused_qualifications,
+    unused_results
+)]
 
 mod error;
 mod expr;
diff --git a/src/parser.rs b/src/parser.rs
index e46639e..d162cd2 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -82,7 +82,7 @@ fn strip_quotes(s: &str) -> &str {
     }
 }
 
-fn opstr(op: Pair<Rule>) -> String {
+fn opstr(op: Pair<'_, Rule>) -> String {
     return normalize_op(op.as_str());
 }
 
@@ -316,6 +316,6 @@ mod tests {
 
     #[test]
     fn point_zm() {
-        CQL2Parser::parse(Rule::GEOMETRY, "POINT ZM(-105.1019 40.1672 4981 42)").unwrap();
+        let _ = CQL2Parser::parse(Rule::GEOMETRY, "POINT ZM(-105.1019 40.1672 4981 42)").unwrap();
     }
 }
diff --git a/src/validator.rs b/src/validator.rs
index 4f382a6..667662b 100644
--- a/src/validator.rs
+++ b/src/validator.rs
@@ -3,6 +3,7 @@ use boon::{Compiler, SchemaIndex, Schemas, ValidationError};
 use serde_json::Value;
 
 /// A re-usable json-schema validator for CQL2.
+#[allow(missing_debug_implementations)]
 pub struct Validator {
     schemas: Schemas,
     index: SchemaIndex,