diff --git a/Cargo.lock b/Cargo.lock
index 610e72c..6e05fde 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2415,9 +2415,9 @@ checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 
 [[package]]
 name = "tucana"
-version = "0.0.64"
+version = "0.0.65"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d98ed8a00732c5458ac803882820ba38d4be5b2ff96804df87ac3412d9b41e9a"
+checksum = "5670bcb2c6c455486e3b5be8b829d7a07bbd06a427d7c6db873259855f34e613"
 dependencies = [
  "pbjson",
  "pbjson-build",
diff --git a/Cargo.toml b/Cargo.toml
index 04621cd..ea5b94f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ edition = "2024"
 [workspace.dependencies]
 serde = "1.0.219"
 serde_json = "1.0.140"
-tucana = "0.0.64"
+tucana = "0.0.65"
 clap = "4.5.41"
 colored = "3.0"
 tabled = "0.20"
diff --git a/crates/cli/src/analyser/flow_type.rs b/crates/cli/src/analyser/flow_type.rs
index 4dc58ff..4f2bdb5 100644
--- a/crates/cli/src/analyser/flow_type.rs
+++ b/crates/cli/src/analyser/flow_type.rs
@@ -77,43 +77,17 @@ impl Analyser {
             ));
         }
 
-        if let Some(identifier) = &flow.input_type
-            && identifier == ""
-        {
+        if &flow.signature == "" {
             self.reporter.add(Diagnose::new(
                 name.clone(),
                 original.clone(),
                 DiagnosticKind::NullField {
-                    field_name: "input_type".into(),
-                },
-            ));
-        }
-
-        if let Some(identifier) = &flow.return_type
-            && identifier == ""
-        {
-            self.reporter.add(Diagnose::new(
-                name.clone(),
-                original.clone(),
-                DiagnosticKind::NullField {
-                    field_name: "return_type".into(),
+                    field_name: "signature".into(),
                 },
             ));
         }
 
         for setting in &flow.settings {
-            for linked in setting.linked_data_type_identifiers.clone() {
-                if !self.data_type_identifier_exists(linked.as_str(), None) {
-                    self.reporter.add(Diagnose::new(
-                        name.clone(),
-                        original.clone(),
-                        DiagnosticKind::UndefinedDataTypeIdentifier {
-                            identifier: linked.clone(),
-                        },
-                    ));
-                }
-            }
-
             if setting.name.is_empty() {
                 self.reporter.add(Diagnose::new(
                     setting.identifier.clone(),
@@ -132,15 +106,6 @@ impl Analyser {
                     },
                 ));
             }
-            if !self.data_type_identifier_exists(&setting.r#type, None) {
-                self.reporter.add(Diagnose::new(
-                    name.clone(),
-                    original.clone(),
-                    DiagnosticKind::UndefinedDataTypeIdentifier {
-                        identifier: setting.r#type.clone(),
-                    },
-                ));
-            }
         }
 
         if self.index.has_flow_type(&name, Some(aft.id)) {