diff --git a/dagger.go b/dagger.go
index 8509232a2..2c1976840 100644
--- a/dagger.go
+++ b/dagger.go
@@ -84,9 +84,9 @@ func (dag *Dagger) Node(L uint64, i uint64) *big.Int {
     m = big.NewInt(3)
   }
 
-  sha := sha3.NewKeccak224()
+  sha := sha3.NewKeccak256()
   sha.Reset()
-  d := sha3.NewKeccak224()
+  d := sha3.NewKeccak256()
   b := new(big.Int)
   ret := new(big.Int)
 
@@ -117,12 +117,12 @@ func (dag *Dagger) Eval(N *big.Int) *big.Int {
   pow := BigPow(2, 26)
   dag.xn = N.Div(N, pow)
 
-  sha := sha3.NewKeccak224()
+  sha := sha3.NewKeccak256()
   sha.Reset()
   ret := new(big.Int)
 
   for k := 0; k < 4; k++ {
-    d := sha3.NewKeccak224()
+    d := sha3.NewKeccak256()
     b := new(big.Int)
 
     d.Reset()