diff --git a/Graph/Graph/Edge.swift b/Graph/Graph/Edge.swift
index b69937895..3c95f9666 100644
--- a/Graph/Graph/Edge.swift
+++ b/Graph/Graph/Edge.swift
@@ -29,11 +29,15 @@ extension Edge: CustomStringConvertible {
 
 extension Edge: Hashable {
 
-  public func hash(into hasher: inout Hasher) {
-    hasher.combine(from.description)
-    hasher.combine(to.description)
-    hasher.combine(weight)
-  }
+    public func hash(into hasher: inout Hasher) {
+              hasher.combine(from)
+              hasher.combine(to)
+           if weight != nil {
+                hasher.combine(weight)
+             }
+            }
+    
+
 }
 
 public func == <T>(lhs: Edge<T>, rhs: Edge<T>) -> Bool {
diff --git a/Graph/Graph/Vertex.swift b/Graph/Graph/Vertex.swift
index 47499dcc6..f74b38396 100644
--- a/Graph/Graph/Vertex.swift
+++ b/Graph/Graph/Vertex.swift
@@ -24,10 +24,16 @@ extension Vertex: CustomStringConvertible {
 
 extension Vertex: Hashable {
 
-  public func hash(into hasher: inout Hasher) {
-    hasher.combine(data)
-    hasher.combine(index)
-  }
+
+
+    
+    public func hasher(into hasher: inout Hasher){
+        
+        hasher.combine(data)
+        hasher.combine(index)
+    }
+
+
 
 }