diff --git a/lang/rust/Cargo.lock b/lang/rust/Cargo.lock
index 6fd2e9a610b..bf2db770996 100644
--- a/lang/rust/Cargo.lock
+++ b/lang/rust/Cargo.lock
@@ -1218,9 +1218,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.127"
+version = "1.0.128"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8043c06d9f82bd7271361ed64f415fe5e12a77fdb52e573e7f06a516dea329ad"
+checksum = "6ff5456707a1de34e7e37f2a6fd3d3f808c318259cbd01ab6377795054b483d8"
 dependencies = [
  "itoa",
  "memchr",
diff --git a/lang/rust/Cargo.toml b/lang/rust/Cargo.toml
index c54bd8d6c42..3e3d13c79be 100644
--- a/lang/rust/Cargo.toml
+++ b/lang/rust/Cargo.toml
@@ -44,7 +44,7 @@ documentation = "https://docs.rs/apache-avro"
 log = { default-features = false, version = "0.4.22" }
 serde = { default-features = false, version = "1.0.209", features = ["derive"] }
 serde_bytes = { default-features = false, version = "0.11.15", features = ["std"] }
-serde_json = { default-features = false, version = "1.0.127", features = ["std"] }
+serde_json = { default-features = false, version = "1.0.128", features = ["std"] }
 
 [profile.release.package.hello-wasm]
 # Tell `rustc` to optimize for small code size.
diff --git a/lang/rust/avro/src/reader.rs b/lang/rust/avro/src/reader.rs
index 39c3473c83e..1655dccfa79 100644
--- a/lang/rust/avro/src/reader.rs
+++ b/lang/rust/avro/src/reader.rs
@@ -54,7 +54,7 @@ struct Block<'r, R> {
 }
 
 impl<'r, R: Read> Block<'r, R> {
-    fn new(reader: R, schemata: Vec<&'r Schema>) -> AvroResult<Block<R>> {
+    fn new(reader: R, schemata: Vec<&'r Schema>) -> AvroResult<Block<'r, R>> {
         let mut block = Block {
             reader,
             codec: Codec::Null,
diff --git a/lang/rust/avro/src/ser.rs b/lang/rust/avro/src/ser.rs
index 748e2d54164..519306a4d0f 100644
--- a/lang/rust/avro/src/ser.rs
+++ b/lang/rust/avro/src/ser.rs
@@ -64,7 +64,7 @@ impl SeqSerializer {
 }
 
 impl<'a> SeqVariantSerializer<'a> {
-    pub fn new(index: u32, variant: &'a str, len: Option<usize>) -> SeqVariantSerializer {
+    pub fn new(index: u32, variant: &'a str, len: Option<usize>) -> SeqVariantSerializer<'a> {
         let items = match len {
             Some(len) => Vec::with_capacity(len),
             None => Vec::new(),
@@ -97,7 +97,7 @@ impl StructSerializer {
 }
 
 impl<'a> StructVariantSerializer<'a> {
-    pub fn new(index: u32, variant: &'a str, len: usize) -> StructVariantSerializer {
+    pub fn new(index: u32, variant: &'a str, len: usize) -> StructVariantSerializer<'a> {
         StructVariantSerializer {
             index,
             variant,