diff --git a/Cargo.lock b/Cargo.lock
index 734de2171..47178eb5e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3689,7 +3689,7 @@ dependencies = [
 
 [[package]]
 name = "parseable"
-version = "2.5.14"
+version = "2.6.0"
 dependencies = [
  "actix-cors",
  "actix-web",
diff --git a/Cargo.toml b/Cargo.toml
index 62a998ef5..65d406fe6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "parseable"
-version = "2.5.14"
+version = "2.6.0"
 authors = ["Parseable Team <hi@parseable.com>"]
 edition = "2024"
 rust-version = "1.88.0"
@@ -183,8 +183,8 @@ arrow = "57.1.0"
 temp-dir = "0.1.14"
 
 [package.metadata.parseable_ui]
-assets-url = "https://parseable-prism-build.s3.us-east-2.amazonaws.com/v2.5.14/build.zip"
-assets-sha1 = "7b3d1a6bea288585183cbc8233af4da91d768853"
+assets-url = "https://parseable-prism-build.s3.us-east-2.amazonaws.com/v2.6.0/build.zip"
+assets-sha1 = "877e8f6f6b80bdd57c3c8a076464a0a90e29974c"
 
 [features]
 debug = []
diff --git a/src/event/format/mod.rs b/src/event/format/mod.rs
index 104823845..54941cb98 100644
--- a/src/event/format/mod.rs
+++ b/src/event/format/mod.rs
@@ -434,7 +434,9 @@ fn value_compatible_with_type(
                         || chrono::NaiveDateTime::parse_from_str(s, "%Y-%m-%d %H:%M:%S%.f").is_ok()
                         || chrono::NaiveDateTime::parse_from_str(s, "%Y-%m-%d %H:%M:%S").is_ok()
                 }
-                Value::Number(_) => true,
+                // Arrow JSON decoder with coerce_primitive(false) cannot decode
+                // a JSON number into a Timestamp field — it expects a string.
+                Value::Number(_) => false,
                 _ => false,
             }
         }