diff --git a/Cargo.lock b/Cargo.lock
index c744c4f..95ab0bc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1001,7 +1001,7 @@ checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
 
 [[package]]
 name = "columnq"
-version = "0.7.0"
+version = "0.8.0"
 dependencies = [
  "arrow-schema",
  "bytes",
@@ -2631,12 +2631,6 @@ dependencies = [
  "vcpkg",
 ]
 
-[[package]]
-name = "linked-hash-map"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"
-
 [[package]]
 name = "linux-raw-sys"
 version = "0.3.8"
@@ -3797,7 +3791,7 @@ dependencies = [
 
 [[package]]
 name = "roapi"
-version = "0.10.0"
+version = "0.11.0"
 dependencies = [
  "arrow-cast",
  "arrow-flight",
@@ -4315,14 +4309,15 @@ dependencies = [
 
 [[package]]
 name = "serde_yaml"
-version = "0.8.26"
+version = "0.9.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "578a7433b776b56a35785ed5ce9a7e777ac0598aac5a6dd1b4b18a307c7fc71b"
+checksum = "1a49e178e4452f45cb61d0cd8cebc1b0fafd3e41929e996cef79aa3aca91f574"
 dependencies = [
- "indexmap 1.9.3",
+ "indexmap 2.0.0",
+ "itoa",
  "ryu",
  "serde",
- "yaml-rust",
+ "unsafe-libyaml",
 ]
 
 [[package]]
@@ -5104,6 +5099,12 @@ dependencies = [
  "void",
 ]
 
+[[package]]
+name = "unsafe-libyaml"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f28467d3e1d3c6586d8f25fa243f544f5800fec42d97032474e17222c2b75cfa"
+
 [[package]]
 name = "untrusted"
 version = "0.7.1"
@@ -5483,15 +5484,6 @@ dependencies = [
  "lzma-sys",
 ]
 
-[[package]]
-name = "yaml-rust"
-version = "0.4.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56c1936c4cc7a1c9ab21a1ebb602eb942ba868cbd44a99cb7cdc5892335e1c85"
-dependencies = [
- "linked-hash-map",
-]
-
 [[package]]
 name = "yansi"
 version = "0.5.1"
diff --git a/columnq/Cargo.toml b/columnq/Cargo.toml
index eff7579..4d979b7 100644
--- a/columnq/Cargo.toml
+++ b/columnq/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "columnq"
-version = "0.7.0"
+version = "0.8.0"
 homepage = "https://github.com/roapi/roapi"
 license = "MIT"
 authors = ["QP Hou <dave2008713@gmail.com>"]
@@ -62,7 +62,7 @@ features = ["default", "dst_arrow"]
 optional = true
 
 [dev-dependencies]
-serde_yaml = "0.8"
+serde_yaml = "0.9"
 toml = "0.7"
 tempfile = "3.3.0"
 pretty_assertions = "*"
diff --git a/columnq/src/table/mod.rs b/columnq/src/table/mod.rs
index 9471d7e..63704ae 100644
--- a/columnq/src/table/mod.rs
+++ b/columnq/src/table/mod.rs
@@ -766,6 +766,28 @@ batch_size: 512
         assert_eq!(table_source.batch_size, 512);
     }
 
+    #[test]
+    fn deserialize_datetime() {
+        let table_source: TableSource = serde_yaml::from_str(
+            r#"
+name: "ts_table"
+uri: "test_data/a.parquet"
+schema:
+  columns:
+    - name: "ts"
+      data_type: !Timestamp [!Second, null]
+"#,
+        )
+        .unwrap();
+
+        use arrow::datatypes::*;
+
+        assert_eq!(
+            DataType::Timestamp(TimeUnit::Second, None),
+            table_source.schema.unwrap().columns[0].data_type,
+        );
+    }
+
     #[test]
     fn test_parse_table_uri() {
         let t = parse_table_uri_arg("t=a/b/c").unwrap();
diff --git a/roapi/Cargo.toml b/roapi/Cargo.toml
index 692fc81..7d67693 100644
--- a/roapi/Cargo.toml
+++ b/roapi/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "roapi"
-version = "0.10.0"
+version = "0.11.0"
 authors = ["QP Hou <dave2008713@gmail.com>"]
 homepage = "https://github.com/roapi/roapi"
 license = "MIT"
@@ -34,7 +34,7 @@ log = "0"
 serde = { version = "1", features = ["rc"] }
 serde_json = "1"
 serde_derive = "1"
-serde_yaml = "0.8"
+serde_yaml = "0.9"
 toml = "0.7"
 clap = { version = "4", features = ["color"] }
 thiserror = "1"
diff --git a/roapi/src/server/flight_sql.rs b/roapi/src/server/flight_sql.rs
index 795f551..5bf972d 100644
--- a/roapi/src/server/flight_sql.rs
+++ b/roapi/src/server/flight_sql.rs
@@ -240,7 +240,7 @@ impl<H: RoapiContext> FlightSqlService for RoapiFlightSqlService<H> {
         info!("getting results for {handle}");
         let result = self.get_result(&handle)?;
         // if we get an empty result, create an empty schema
-        let (schema, batches) = match result.get(0) {
+        let (schema, batches) = match result.first() {
             None => (Arc::new(Schema::empty()), vec![]),
             Some(batch) => (batch.schema(), result.clone()),
         };
@@ -286,7 +286,7 @@ impl<H: RoapiContext> FlightSqlService for RoapiFlightSqlService<H> {
             .map_err(|e| internal_error!("Error executing query", e))?;
 
         // if we get an empty result, create an empty schema
-        let schema = match result.get(0) {
+        let schema = match result.first() {
             None => Schema::empty(),
             Some(batch) => (*batch.schema()).clone(),
         };
@@ -364,7 +364,7 @@ impl<H: RoapiContext> FlightSqlService for RoapiFlightSqlService<H> {
             .map_err(|e| internal_error!("Error executing query", e))?;
 
         // if we get an empty result, create an empty schema
-        let schema = match result.get(0) {
+        let schema = match result.first() {
             None => Schema::empty(),
             Some(batch) => (*batch.schema()).clone(),
         };
@@ -632,7 +632,7 @@ impl<H: RoapiContext> FlightSqlService for RoapiFlightSqlService<H> {
         // TODO: ignore SYSTEM TABLE and VIEW
         let table_type = query
             .table_types
-            .get(0)
+            .first()
             .map(|s| s.as_str())
             .unwrap_or_else(|| "table")
             .to_string();