diff --git a/nexus/Cargo.lock b/nexus/Cargo.lock
index 3876b4be1f..2ea6421fef 100644
--- a/nexus/Cargo.lock
+++ b/nexus/Cargo.lock
@@ -1989,7 +1989,7 @@ dependencies = [
  "anyhow",
  "async-recursion",
  "async-trait",
- "base64 0.13.1",
+ "base64 0.21.4",
  "catalog",
  "chrono",
  "dashmap",
diff --git a/nexus/peer-bigquery/src/stream.rs b/nexus/peer-bigquery/src/stream.rs
index 0edf35757d..e4c3aca513 100644
--- a/nexus/peer-bigquery/src/stream.rs
+++ b/nexus/peer-bigquery/src/stream.rs
@@ -4,7 +4,7 @@ use std::{
     task::{Context, Poll},
 };
 
-use chrono::{DateTime, NaiveDateTime, Utc};
+use chrono::{NaiveDateTime, TimeZone, Utc};
 use futures::Stream;
 use gcp_bigquery_client::model::{
     field_type::FieldType, query_response::ResultSet, table_field_schema::TableFieldSchema,
@@ -149,9 +149,8 @@ impl BqRecordStream {
                         if let Some(ts) = timestamp {
                             let naive_datetime = NaiveDateTime::from_timestamp_opt(ts, 0)
                                 .ok_or(anyhow::Error::msg("Invalid naive datetime"))?;
-                            Some(Value::Timestamp(DateTime::<Utc>::from_utc(
-                                naive_datetime,
-                                Utc,
+                            Some(Value::Timestamp(Utc.from_utc_datetime(
+                                &naive_datetime,
                             )))
                         } else {
                             None
diff --git a/nexus/peer-snowflake/Cargo.toml b/nexus/peer-snowflake/Cargo.toml
index c8e5f673be..ce61c79778 100644
--- a/nexus/peer-snowflake/Cargo.toml
+++ b/nexus/peer-snowflake/Cargo.toml
@@ -15,7 +15,7 @@ pgerror = { path = "../pgerror" }
 secrecy = { version = "0.8.0" }
 async-trait = "0.1.57"
 jsonwebtoken = { version = "8.0", features = ["use_pem"] }
-base64 = "0.13"
+base64 = "0.21"
 dashmap = "5.0"
 pgwire = "0.15"
 sha2 = "0.10"
diff --git a/nexus/peer-snowflake/src/auth.rs b/nexus/peer-snowflake/src/auth.rs
index e71c6f8973..1798349a81 100644
--- a/nexus/peer-snowflake/src/auth.rs
+++ b/nexus/peer-snowflake/src/auth.rs
@@ -4,7 +4,7 @@ use std::{
 };
 
 use anyhow::Context;
-use base64::encode as base64_encode;
+use base64::Engine;
 use jsonwebtoken::{encode as jwt_encode, Algorithm, EncodingKey, Header};
 use pkcs1::EncodeRsaPrivateKey;
 use pkcs8::{DecodePrivateKey, EncodePublicKey};
@@ -99,7 +99,7 @@ impl SnowflakeAuth {
         let public_key = EncodePublicKey::to_public_key_der(&RsaPublicKey::from(private_key))?;
         let res = format!(
             "SHA256:{}",
-            base64_encode(Sha256::new_with_prefix(public_key.as_bytes()).finalize())
+            base64::engine::general_purpose::STANDARD.encode(Sha256::new_with_prefix(public_key.as_bytes()).finalize())
         );
         Ok(res)
     }
diff --git a/nexus/peer-snowflake/src/stream.rs b/nexus/peer-snowflake/src/stream.rs
index 0417163957..b4290707a9 100644
--- a/nexus/peer-snowflake/src/stream.rs
+++ b/nexus/peer-snowflake/src/stream.rs
@@ -1,5 +1,5 @@
 use crate::{auth::SnowflakeAuth, PartitionResult, ResultSet};
-use chrono::{DateTime, NaiveDate, NaiveDateTime, NaiveTime, Utc};
+use chrono::{DateTime, NaiveDate, NaiveDateTime, NaiveTime, TimeZone, Utc};
 use futures::Stream;
 use peer_cursor::Schema;
 use peer_cursor::{Record, RecordStream, SchemaRef};
@@ -146,18 +146,16 @@ impl SnowflakeRecordStream {
                         // really hacky workaround for parsing the UTC timezone specifically.
                         SnowflakeDataType::TimestampLtz => {
                             match DateTime::parse_from_str(elem, TIMESTAMP_TZ_PARSE_FORMAT) {
-                                Ok(_) => TimestampWithTimeZone(DateTime::<Utc>::from_utc(
-                                    DateTime::parse_from_str(elem, TIMESTAMP_TZ_PARSE_FORMAT)?
+                                Ok(_) => TimestampWithTimeZone(Utc.from_utc_datetime(
+                                    &DateTime::parse_from_str(elem, TIMESTAMP_TZ_PARSE_FORMAT)?
                                         .naive_utc(),
-                                    Utc,
                                 )),
-                                Err(_) => TimestampWithTimeZone(DateTime::<Utc>::from_utc(
-                                    DateTime::parse_from_str(
+                                Err(_) => TimestampWithTimeZone(Utc.from_utc_datetime(
+                                    &DateTime::parse_from_str(
                                         &elem.replace("Z", "+0000"),
                                         TIMESTAMP_TZ_PARSE_FORMAT,
                                     )?
                                     .naive_utc(),
-                                    Utc,
                                 )),
                             }
                         }
@@ -166,18 +164,16 @@ impl SnowflakeRecordStream {
                         ),
                         SnowflakeDataType::TimestampTz => {
                             match DateTime::parse_from_str(elem, TIMESTAMP_TZ_PARSE_FORMAT) {
-                                Ok(_) => TimestampWithTimeZone(DateTime::<Utc>::from_utc(
-                                    DateTime::parse_from_str(elem, TIMESTAMP_TZ_PARSE_FORMAT)?
+                                Ok(_) => TimestampWithTimeZone(Utc.from_utc_datetime(
+                                    &DateTime::parse_from_str(elem, TIMESTAMP_TZ_PARSE_FORMAT)?
                                         .naive_utc(),
-                                    Utc,
                                 )),
-                                Err(_) => TimestampWithTimeZone(DateTime::<Utc>::from_utc(
-                                    DateTime::parse_from_str(
+                                Err(_) => TimestampWithTimeZone(Utc.from_utc_datetime(
+                                    &DateTime::parse_from_str(
                                         &elem.replace("Z", "+0000"),
                                         TIMESTAMP_TZ_PARSE_FORMAT,
                                     )?
                                     .naive_utc(),
-                                    Utc,
                                 )),
                             }
                         }
diff --git a/nexus/value/src/lib.rs b/nexus/value/src/lib.rs
index 8627a50d41..2c65738c65 100644
--- a/nexus/value/src/lib.rs
+++ b/nexus/value/src/lib.rs
@@ -1,4 +1,5 @@
 use array::ArrayValue;
+use base64::Engine;
 use bytes::Bytes;
 use chrono::{DateTime, NaiveDate, NaiveDateTime, NaiveTime, Utc};
 use rust_decimal::Decimal;
@@ -236,8 +237,8 @@ impl Value {
             Value::Char(c) => serde_json::Value::String(c.to_string()),
             Value::VarChar(s) => serde_json::Value::String(s.clone()),
             Value::Text(s) => serde_json::Value::String(s.clone()),
-            Value::Binary(b) => serde_json::Value::String(base64::encode(b)),
-            Value::VarBinary(b) => serde_json::Value::String(base64::encode(b)),
+            Value::Binary(b) => serde_json::Value::String(base64::engine::general_purpose::STANDARD.encode(b)),
+            Value::VarBinary(b) => serde_json::Value::String(base64::engine::general_purpose::STANDARD.encode(b)),
             Value::Date(d) => serde_json::Value::String(d.to_string()),
             Value::Time(t) => serde_json::Value::String(t.to_string()),
             Value::TimeWithTimeZone(t) => serde_json::Value::String(t.to_string()),