diff --git a/CHANGELOG.md b/CHANGELOG.md
index 51b6720..20653a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ file is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and
 this project adheres to [Semantic
 Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+
+- Remove `post_body` field in `Http`
+
 ## [0.15.2+tis.0.0.1] - 2024-01-08
 
 ### Added
@@ -224,6 +230,7 @@ Versioning](https://semver.org/spec/v2.0.0.html).
 
 - Move from giganto
 
+[Unreleased]: https://github.com/aicers/giganto-client/compare/0.15.2+tis.0.0.1...tis
 [0.15.2+tis.0.0.1]: https://github.com/aicers/giganto-client/compare/0.15.1...0.15.2+tis.0.0.1
 [0.15.2]: https://github.com/aicers/giganto-client/compare/0.15.1...0.15.2
 [0.15.1]: https://github.com/aicers/giganto-client/compare/0.15.0...0.15.1
diff --git a/src/ingest.rs b/src/ingest.rs
index 73b9967..b4742d9 100644
--- a/src/ingest.rs
+++ b/src/ingest.rs
@@ -195,7 +195,7 @@ mod tests {
         let nsec = 123;
         let ndt = NaiveDateTime::from_timestamp_opt(sec, nsec).unwrap();
 
-        let ts = ndt.timestamp_nanos();
+        let ts = ndt.timestamp_nanos_opt().unwrap();
         let ts_fmt = super::convert_time_format(ts);
         assert_eq!(ts_fmt, "2.000000123");
 
@@ -203,7 +203,7 @@ mod tests {
         let nsec = 0;
         let ndt = NaiveDateTime::from_timestamp_opt(sec, nsec).unwrap();
 
-        let ts = ndt.timestamp_nanos();
+        let ts = ndt.timestamp_nanos_opt().unwrap();
         let ts_fmt = super::convert_time_format(ts);
         assert_eq!(ts_fmt, "-1.000000000");
     }
diff --git a/src/publish.rs b/src/publish.rs
index 3760e4f..336e0dc 100644
--- a/src/publish.rs
+++ b/src/publish.rs
@@ -700,7 +700,6 @@ mod tests {
             orig_mime_types: Vec::new(),
             resp_filenames: Vec::new(),
             resp_mime_types: Vec::new(),
-            post_body: Vec::new(),
         };
         let raw_event = bincode::serialize(&http).unwrap();
         let source = bincode::serialize(&"hello").unwrap();