diff --git a/crates/backend/Cargo.toml b/crates/backend/Cargo.toml
index 8caffd62a..7b1b3d25d 100644
--- a/crates/backend/Cargo.toml
+++ b/crates/backend/Cargo.toml
@@ -16,7 +16,7 @@ spans = []
 extra-traits = ["syn/extra-traits"]
 
 [dependencies]
-bumpalo = "2.1"
+bumpalo = "3.0.0"
 lazy_static = "1.0.0"
 log = "0.4"
 proc-macro2 = "1.0"
diff --git a/crates/backend/src/encode.rs b/crates/backend/src/encode.rs
index c678dd8f9..d60e34c67 100644
--- a/crates/backend/src/encode.rs
+++ b/crates/backend/src/encode.rs
@@ -64,8 +64,8 @@ impl Interner {
     fn intern_str(&self, s: &str) -> &str {
         // NB: eventually this could be used to intern `s` to only allocate one
         // copy, but for now let's just "transmute" `s` to have the same
-        // lifetmie as this struct itself (which is our main goal here)
-        bumpalo::collections::String::from_str_in(s, &self.bump).into_bump_str()
+        // lifetime as this struct itself (which is our main goal here)
+        self.bump.alloc_str(s)
     }
 
     /// Given an import to a local module `id` this generates a unique module id
diff --git a/crates/webidl/src/util.rs b/crates/webidl/src/util.rs
index 45156a261..c15a6d1ba 100644
--- a/crates/webidl/src/util.rs
+++ b/crates/webidl/src/util.rs
@@ -424,7 +424,7 @@ impl<'src> FirstPassRecord<'src> {
         // signature where that and all remaining optional arguments are
         // undefined.
         let mut signatures = Vec::new();
-        'outer: for signature in data.signatures.iter() {
+        for signature in data.signatures.iter() {
             let mut idl_args = Vec::with_capacity(signature.args.len());
             for (i, arg) in signature.args.iter().enumerate() {
                 if arg.optional {