diff --git a/crates/webidl/Cargo.toml b/crates/webidl/Cargo.toml
index a2532e85..d597faf9 100644
--- a/crates/webidl/Cargo.toml
+++ b/crates/webidl/Cargo.toml
@@ -20,4 +20,4 @@ proc-macro2 = "1.0"
 quote = '1.0'
 syn = { version = '1.0', features = ['full'] }
 wasm-bindgen-backend = { version = "=0.2.58", path = "../backend" }
-weedle = "0.10"
+weedle = "0.11"
diff --git a/crates/webidl/src/first_pass.rs b/crates/webidl/src/first_pass.rs
index c2473943..13b1edc9 100644
--- a/crates/webidl/src/first_pass.rs
+++ b/crates/webidl/src/first_pass.rs
@@ -475,6 +475,13 @@ impl<'src> FirstPass<'src, (&'src str, ApiStability)> for weedle::interface::Int
                     .push(const_);
                 Ok(())
             }
+            InterfaceMember::Constructor(_) => {
+                log::warn!(
+                    "Unsupported WebIDL Constructor interface member: {:?}",
+                    self
+                );
+                Ok(())
+            }
             InterfaceMember::Iterable(_iterable) => {
                 log::warn!("Unsupported WebIDL iterable interface member: {:?}", self);
                 Ok(())
diff --git a/crates/webidl/src/lib.rs b/crates/webidl/src/lib.rs
index 2806c37f..a0bd749a 100644
--- a/crates/webidl/src/lib.rs
+++ b/crates/webidl/src/lib.rs
@@ -37,6 +37,7 @@ use wasm_bindgen_backend::TryToTokens;
 use weedle::attribute::ExtendedAttributeList;
 use weedle::dictionary::DictionaryMember;
 use weedle::interface::InterfaceMember;
+use weedle::Parse;
 
 struct Program {
     main: ast::Program,
@@ -74,26 +75,19 @@ impl Default for ApiStability {
 }
 
 fn parse_source(source: &str) -> Result<Vec<weedle::Definition>> {
-    weedle::parse(source).map_err(|e| {
-        match &e {
-            weedle::Err::Incomplete(needed) => anyhow::anyhow!("needed {:?} more bytes", needed),
-            weedle::Err::Error(cx) | weedle::Err::Failure(cx) => {
-                // Note that #[allow] here is a workaround for Geal/nom#843
-                // because the `Context` type here comes from `nom` and if
-                // something else in our crate graph enables the
-                // `verbose-errors` feature then we need to still compiled
-                // against the changed enum definition.
-                #[allow(unreachable_patterns)]
-                let remaining = match cx {
-                    weedle::Context::Code(remaining, _) => remaining.len(),
-                    _ => 0,
-                };
-                let pos = source.len() - remaining;
+    match weedle::Definitions::parse(source) {
+        Ok(("", parsed)) => Ok(parsed),
 
-                WebIDLParseError(pos).into()
-            }
+        Ok((remaining, _))
+        | Err(weedle::Err::Error((remaining, _)))
+        | Err(weedle::Err::Failure((remaining, _))) => {
+            Err(WebIDLParseError(source.len() - remaining.len()).into())
         }
-    })
+
+        Err(weedle::Err::Incomplete(needed)) => {
+            Err(anyhow::anyhow!("needed {:?} more bytes", needed))
+        }
+    }
 }
 
 /// Parse a string of WebIDL source text into a wasm-bindgen AST.