diff --git a/backend/app/db/models.py b/backend/app/db/models.py
index fe73763..5c004fb 100644
--- a/backend/app/db/models.py
+++ b/backend/app/db/models.py
@@ -69,7 +69,7 @@ class Edge(Base):
     animated: Mapped[str] = mapped_column(String, nullable=False, default='none')
     source_handle: Mapped[str | None] = mapped_column(String)
     target_handle: Mapped[str | None] = mapped_column(String)
-    waypoints: Mapped[list | None] = mapped_column(JSON, nullable=True)
+    waypoints: Mapped[list[dict[str, float]] | None] = mapped_column(JSON, nullable=True)
     created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
 
 
diff --git a/backend/app/schemas/canvas.py b/backend/app/schemas/canvas.py
index 18e4e31..1eccd96 100644
--- a/backend/app/schemas/canvas.py
+++ b/backend/app/schemas/canvas.py
@@ -50,7 +50,7 @@ class EdgeSave(BaseModel):
     animated: str = 'none'
     source_handle: str | None = None
     target_handle: str | None = None
-    waypoints: list | None = None
+    waypoints: list[dict[str, float]] | None = None
 
     @field_validator('animated', mode='before')
     @classmethod
diff --git a/backend/app/schemas/edges.py b/backend/app/schemas/edges.py
index 9c83d8a..8baa45b 100644
--- a/backend/app/schemas/edges.py
+++ b/backend/app/schemas/edges.py
@@ -17,7 +17,7 @@ class EdgeBase(BaseModel):
     animated: str = 'none'
     source_handle: str | None = None
     target_handle: str | None = None
-    waypoints: list | None = None
+    waypoints: list[dict[str, float]] | None = None
 
     @field_validator('animated', mode='before')
     @classmethod
@@ -39,7 +39,7 @@ class EdgeUpdate(BaseModel):
     animated: str | None = None
     source_handle: str | None = None
     target_handle: str | None = None
-    waypoints: list | None = None
+    waypoints: list[dict[str, float]] | None = None
 
     @field_validator('animated', mode='before')
     @classmethod