diff --git a/Cargo.toml b/Cargo.toml
index b13ec79..6797e52 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,9 @@
 [workspace]
 members = [
-  "pbjson",
-  "pbjson-build",
-  "pbjson-test",
-  "pbjson-types",
+    "pbjson",
+    "pbjson-build",
+    "pbjson-test",
+    "pbjson-types",
 ]
+
+resolver = "2"
\ No newline at end of file
diff --git a/pbjson-build/Cargo.toml b/pbjson-build/Cargo.toml
index 5774a66..153eb80 100644
--- a/pbjson-build/Cargo.toml
+++ b/pbjson-build/Cargo.toml
@@ -11,8 +11,8 @@ repository = "https://github.com/influxdata/pbjson"
 
 [dependencies]
 heck = "0.4"
-prost = "0.11"
-prost-types = "0.11"
+prost = "0.12"
+prost-types = "0.12"
 itertools = "0.10"
 
 [dev-dependencies]
diff --git a/pbjson-build/src/message.rs b/pbjson-build/src/message.rs
index 4364fca..8153153 100644
--- a/pbjson-build/src/message.rs
+++ b/pbjson-build/src/message.rs
@@ -183,7 +183,7 @@ fn field_modifier(
     field: &FieldDescriptorProto,
     field_type: &FieldType,
 ) -> FieldModifier {
-    let label = Label::from_i32(field.label.expect("expected label")).expect("valid label");
+    let label = Label::try_from(field.label.expect("expected label")).expect("valid label");
     if field.proto3_optional.unwrap_or(false) {
         assert_eq!(label, Label::Optional);
         return FieldModifier::Optional;
@@ -217,7 +217,7 @@ fn field_type(descriptors: &DescriptorSet, field: &FieldDescriptorProto) -> Fiel
         Some(type_name) => resolve_type(descriptors, type_name.as_str()),
         None => {
             let scalar =
-                match Type::from_i32(field.r#type.expect("expected type")).expect("valid type") {
+                match Type::try_from(field.r#type.expect("expected type")).expect("valid type") {
                     Type::Double => ScalarType::F64,
                     Type::Float => ScalarType::F32,
                     Type::Int64 | Type::Sfixed64 | Type::Sint64 => ScalarType::I64,
diff --git a/pbjson-test/Cargo.toml b/pbjson-test/Cargo.toml
index 5b7fb55..f1c6b5f 100644
--- a/pbjson-test/Cargo.toml
+++ b/pbjson-test/Cargo.toml
@@ -7,7 +7,7 @@ description = "Test resources for pbjson converion"
 repository = "https://github.com/influxdata/pbjson"
 
 [dependencies]
-prost = "0.11"
+prost = "0.12"
 pbjson = { path = "../pbjson" }
 pbjson-types = { path = "../pbjson-types" }
 serde = { version = "1.0", features = ["derive"] }
@@ -24,5 +24,5 @@ chrono = "0.4"
 serde_json = "1.0"
 
 [build-dependencies]
-prost-build = "0.11"
+prost-build = "0.12"
 pbjson-build = { path = "../pbjson-build" }
diff --git a/pbjson-types/Cargo.toml b/pbjson-types/Cargo.toml
index 570639b..ba3c917 100644
--- a/pbjson-types/Cargo.toml
+++ b/pbjson-types/Cargo.toml
@@ -14,12 +14,12 @@ exclude = ["protos/*"]
 bytes = "1.0"
 chrono = { version = "0.4", default-features = false, features = ["alloc"] }
 pbjson = { path = "../pbjson", version = "0.5" }
-prost = "0.11"
+prost = "0.12"
 serde = { version = "1.0", features = ["derive"] }
 
 [dev-dependencies]
 serde_json = "1.0"
 
 [build-dependencies] # In alphabetical order
-prost-build = "0.11"
+prost-build = "0.12"
 pbjson-build = { path = "../pbjson-build", version = "0.5" }
diff --git a/pbjson-types/descriptors.bin b/pbjson-types/descriptors.bin
index b7fe631..0e370ea 100644
Binary files a/pbjson-types/descriptors.bin and b/pbjson-types/descriptors.bin differ
diff --git a/pbjson-types/src/timestamp.rs b/pbjson-types/src/timestamp.rs
index 1722a9a..e7a1fc5 100644
--- a/pbjson-types/src/timestamp.rs
+++ b/pbjson-types/src/timestamp.rs
@@ -1,9 +1,9 @@
 use crate::Timestamp;
-use chrono::{DateTime, NaiveDateTime, Utc};
+use chrono::{DateTime, NaiveDateTime, TimeZone, Utc};
 use serde::de::Visitor;
 use serde::Serialize;
 
-impl TryFrom<Timestamp> for chrono::DateTime<Utc> {
+impl TryFrom<Timestamp> for DateTime<Utc> {
     type Error = &'static str;
     fn try_from(value: Timestamp) -> Result<Self, Self::Error> {
         let Timestamp { seconds, nanos } = value;
@@ -15,7 +15,7 @@ impl TryFrom<Timestamp> for chrono::DateTime<Utc> {
                 .map_err(|_| "out of range integral type conversion attempted")?,
         )
         .ok_or("invalid or out-of-range datetime")?;
-        Ok(Self::from_utc(dt, Utc))
+        Ok(Utc.from_utc_datetime(&dt))
     }
 }
 
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 7b7e745..e724aeb 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.71"
+channel = "1.72"
 components = ["rustfmt", "clippy"]