diff --git a/Cargo.toml b/Cargo.toml
index b32c1873..41d377e7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-edition = "2018"
+edition = "2021"
 authors = [
   "Richard Newman <rnewman@twinql.com>",
   "Nicholas Alexander <nalexander@mozilla.com>",
@@ -14,7 +14,7 @@ authors = [
   "Gregory Burd <greg@burd.me>",
 ]
 name = "mentat"
-version = "0.13.0"
+version = "0.14.0"
 build = "build/version.rs"
 
 [features]
diff --git a/Makefile b/Makefile
index b9a0a584..d718bf76 100644
--- a/Makefile
+++ b/Makefile
@@ -6,3 +6,5 @@ outdated:
 fix:
 	$(for p in $(dirname $(ls Cargo.toml */Cargo.toml */*/Cargo.toml)); do echo $p; (cd $p; cargo fix --allow-dirty --broken-code --edition-idioms); done)
 
+upgrades:
+	cargo upgrades
diff --git a/build/version.rs b/build/version.rs
index d5aa81a3..0b14f826 100644
--- a/build/version.rs
+++ b/build/version.rs
@@ -14,7 +14,7 @@ use std::process::exit;
 
 /// MIN_VERSION should be changed when there's a new minimum version of rustc required
 /// to build the project.
-static MIN_VERSION: &str = "1.43.0";
+static MIN_VERSION: &str = "1.69.0";
 
 fn main() {
     let ver = version().unwrap();
diff --git a/edn/src/query.rs b/edn/src/query.rs
index c2aaa185..dde4e91b 100644
--- a/edn/src/query.rs
+++ b/edn/src/query.rs
@@ -1028,8 +1028,8 @@ impl ParsedQuery {
         Ok(ParsedQuery {
             find_spec: find_spec.ok_or("expected :find")?,
             default_source: SrcVar::DefaultSrc,
-            with: with.unwrap_or_else(Vec::new), //
-            in_vars: in_vars.unwrap_or_else(Vec::new),
+            with: with.unwrap_or_default(),
+            in_vars: in_vars.unwrap_or_default(),
             in_sources: BTreeSet::default(),
             limit: limit.unwrap_or(Limit::None),
             where_clauses: where_clauses.ok_or("expected :where")?,
diff --git a/edn/src/types.rs b/edn/src/types.rs
index 4ad8f975..beb20878 100644
--- a/edn/src/types.rs
+++ b/edn/src/types.rs
@@ -690,7 +690,7 @@ pub trait FromMillis {
 
 impl FromMillis for DateTime<Utc> {
     fn from_millis(ts: i64) -> Self {
-        Utc.timestamp_opt(ts / 1_000, ((ts % 1_000).abs() as u32) * 1_000).unwrap()
+        Utc.timestamp_opt(ts / 1_000, ((ts % 1_000).unsigned_abs() as u32) * 1_000).unwrap()
     }
 }
 
diff --git a/edn/src/utils.rs b/edn/src/utils.rs
index 61b1177b..e9338633 100644
--- a/edn/src/utils.rs
+++ b/edn/src/utils.rs
@@ -21,7 +21,7 @@ use crate::types::Value;
 /// TODO: implement `merge` for [Value], following the `concat`/`SliceConcatExt` pattern.
 pub fn merge(left: &Value, right: &Value) -> Option<Value> {
     match (left, right) {
-        (&Value::Map(ref l), &Value::Map(ref r)) => {
+        (Value::Map(l), Value::Map(r)) => {
             let mut result = l.clone();
             result.extend(r.clone());
             Some(Value::Map(result))