diff --git a/factgenie/models.py b/factgenie/models.py
index e4dd73b..9bde9b4 100644
--- a/factgenie/models.py
+++ b/factgenie/models.py
@@ -53,12 +53,12 @@ def from_config(config, mode):
 
 
 class SpanAnnotation(BaseModel):
+    reason: str = Field(description="The reason for the annotation.")
     text: str = Field(description="The text which is annotated.")
     # Do not name it type since it is a reserved keyword in JSON schema
     annotation_type: int = Field(
         description="Index to the list of span annotation types defined for the annotation campaign."
     )
-    reason: str = Field(description="The reason for the annotation.")
 
 
 class OutputAnnotations(BaseModel):