diff --git a/examples/appender.rs b/examples/appender.rs
index b2ba0c6a..c159829d 100644
--- a/examples/appender.rs
+++ b/examples/appender.rs
@@ -1,5 +1,4 @@
 extern crate duckdb;
-use std::convert::TryFrom;
 
 use duckdb::{params, Connection, DropBehavior, Result};
 
diff --git a/src/appender/mod.rs b/src/appender/mod.rs
index 195c2d8b..7db98e2d 100644
--- a/src/appender/mod.rs
+++ b/src/appender/mod.rs
@@ -1,5 +1,5 @@
 use super::{ffi, AppenderParams, Connection, Result, ValueRef};
-use std::{ffi::c_void, fmt, iter::IntoIterator, os::raw::c_char};
+use std::{ffi::c_void, fmt, os::raw::c_char};
 
 use crate::{
     error::result_from_duckdb_appender,
@@ -170,7 +170,6 @@ impl fmt::Debug for Appender<'_> {
 #[cfg(test)]
 mod test {
     use crate::{Connection, Result};
-    use std::convert::TryFrom;
 
     #[test]
     fn test_append_one_row() -> Result<()> {
diff --git a/src/lib.rs b/src/lib.rs
index 6737cf88..129e51c5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -60,7 +60,6 @@ pub use libduckdb_sys as ffi;
 use std::{
     cell::RefCell,
     convert,
-    default::Default,
     ffi::CString,
     fmt,
     path::{Path, PathBuf},
diff --git a/src/r2d2.rs b/src/r2d2.rs
index b05225e5..75203671 100644
--- a/src/r2d2.rs
+++ b/src/r2d2.rs
@@ -102,7 +102,7 @@ impl r2d2::ManageConnection for DuckdbConnectionManager {
 mod test {
     extern crate r2d2;
     use super::*;
-    use crate::{types::Value, Result};
+    use crate::types::Value;
     use std::{sync::mpsc, thread};
 
     use tempdir::TempDir;
diff --git a/src/raw_statement.rs b/src/raw_statement.rs
index a94eaba4..a99f8022 100644
--- a/src/raw_statement.rs
+++ b/src/raw_statement.rs
@@ -1,4 +1,4 @@
-use std::{convert::TryFrom, ffi::CStr, ptr, rc::Rc, sync::Arc};
+use std::{ffi::CStr, ptr, rc::Rc, sync::Arc};
 
 use arrow::{
     array::StructArray,
diff --git a/src/statement.rs b/src/statement.rs
index 7e5815fc..810399a9 100644
--- a/src/statement.rs
+++ b/src/statement.rs
@@ -1,4 +1,4 @@
-use std::{convert, ffi::c_void, fmt, iter::IntoIterator, mem, os::raw::c_char, ptr, str};
+use std::{convert, ffi::c_void, fmt, mem, os::raw::c_char, ptr, str};
 
 use arrow::{array::StructArray, datatypes::DataType};
 
diff --git a/src/types/chrono.rs b/src/types/chrono.rs
index dea18b8e..e4f9365c 100644
--- a/src/types/chrono.rs
+++ b/src/types/chrono.rs
@@ -63,12 +63,15 @@ impl FromSql for NaiveDateTime {
                     TimeUnit::Microsecond => (t / 1_000_000, (t % 1_000_000) * 1000),
                     TimeUnit::Nanosecond => (t / 1_000_000_000, t % 1_000_000_000),
                 };
-                Ok(NaiveDateTime::from_timestamp_opt(secs, nsecs as u32).unwrap())
-            }
-            ValueRef::Date32(d) => Ok(NaiveDateTime::from_timestamp_opt(24 * 3600 * (d as i64), 0).unwrap()),
-            ValueRef::Time64(TimeUnit::Microsecond, d) => {
-                Ok(NaiveDateTime::from_timestamp_opt(d / 1_000_000, ((d % 1_000_000) * 1_000) as u32).unwrap())
+                Ok(DateTime::from_timestamp(secs, nsecs as u32).unwrap().naive_utc())
             }
+            ValueRef::Date32(d) => Ok(DateTime::from_timestamp(24 * 3600 * (d as i64), 0).unwrap().naive_utc()),
+            ValueRef::Time64(TimeUnit::Microsecond, d) => Ok(DateTime::from_timestamp(
+                d / 1_000_000,
+                ((d % 1_000_000) * 1_000) as u32,
+            )
+            .unwrap()
+            .naive_utc()),
             ValueRef::Text(s) => {
                 let mut s = std::str::from_utf8(s).unwrap();
                 let format = match s.len() {
@@ -206,7 +209,7 @@ mod test {
         assert_eq!(utc, v2);
 
         let v3: DateTime<Utc> = db.query_row("SELECT '2016-02-23 23:56:04'", [], |r| r.get(0))?;
-        assert_eq!(utc - Duration::milliseconds(789), v3);
+        assert_eq!(utc - Duration::try_milliseconds(789).unwrap(), v3);
 
         let v4: DateTime<Utc> = db.query_row("SELECT '2016-02-23 23:56:04.789+00:00'", [], |r| r.get(0))?;
         assert_eq!(utc, v4);
diff --git a/src/types/from_sql.rs b/src/types/from_sql.rs
index b784f098..85b1881d 100644
--- a/src/types/from_sql.rs
+++ b/src/types/from_sql.rs
@@ -272,7 +272,6 @@ impl FromSql for Value {
 mod test {
     use super::FromSql;
     use crate::{Connection, Error, Result};
-    use std::convert::TryFrom;
 
     #[test]
     fn test_timestamp_raw() -> Result<()> {
diff --git a/src/vtab/arrow.rs b/src/vtab/arrow.rs
index 277a85d2..e6d7eb92 100644
--- a/src/vtab/arrow.rs
+++ b/src/vtab/arrow.rs
@@ -6,8 +6,8 @@ use super::{
 use crate::vtab::vector::Inserter;
 use arrow::array::{
     as_boolean_array, as_large_list_array, as_list_array, as_primitive_array, as_string_array, Array, ArrayData,
-    ArrowPrimitiveType, BooleanArray, Decimal128Array, FixedSizeListArray, GenericListArray, OffsetSizeTrait,
-    PrimitiveArray, StringArray, StructArray,
+    BooleanArray, Decimal128Array, FixedSizeListArray, GenericListArray, OffsetSizeTrait, PrimitiveArray, StringArray,
+    StructArray,
 };
 
 use arrow::{
diff --git a/src/vtab/mod.rs b/src/vtab/mod.rs
index 678ecd71..22937e3e 100644
--- a/src/vtab/mod.rs
+++ b/src/vtab/mod.rs
@@ -163,7 +163,6 @@ impl InnerConnection {
 #[cfg(test)]
 mod test {
     use super::*;
-    use crate::{Connection, Result};
     use std::{
         error::Error,
         ffi::{c_char, CString},