diff --git a/consensus/progpow/algorithm.go b/consensus/progpow/algorithm.go
index 65578675d..7a7f985c1 100644
--- a/consensus/progpow/algorithm.go
+++ b/consensus/progpow/algorithm.go
@@ -19,7 +19,6 @@ package progpow
 import (
 	"encoding/binary"
 	"hash"
-	"math"
 	"math/big"
 	"reflect"
 	"runtime"
@@ -35,20 +34,24 @@ import (
 	"github.com/dominant-strategies/go-quai/common/bitutil"
 	"github.com/dominant-strategies/go-quai/crypto"
 	"github.com/dominant-strategies/go-quai/log"
+	"github.com/dominant-strategies/go-quai/params"
 )
 
 const (
-	datasetInitBytes   = 1 << 32        // Bytes in dataset at genesis
-	datasetGrowthBytes = 1 << 26        // Dataset growth per epoch
-	cacheInitBytes     = 1 << 24        // Bytes in cache at genesis
-	cacheGrowthBytes   = 1 << 21        // Cache growth per epoch
-	C_epochLength      = math.MaxUint64 // Blocks per epoch
-	mixBytes           = 128            // Width of mix
-	hashBytes          = 64             // Hash length in bytes
-	hashWords          = 16             // Number of 32 bit ints in a hash
-	datasetParents     = 512            // Number of parents of each dataset element
-	cacheRounds        = 3              // Number of rounds in cache production
-	loopAccesses       = 64             // Number of accesses in hashimoto loop
+	datasetInitBytes   = 1 << 32 // Bytes in dataset at genesis
+	datasetGrowthBytes = 1 << 26 // Dataset growth per epoch
+	cacheInitBytes     = 1 << 24 // Bytes in cache at genesis
+	cacheGrowthBytes   = 1 << 21 // Cache growth per epoch
+	mixBytes           = 128     // Width of mix
+	hashBytes          = 64      // Hash length in bytes
+	hashWords          = 16      // Number of 32 bit ints in a hash
+	datasetParents     = 512     // Number of parents of each dataset element
+	cacheRounds        = 3       // Number of rounds in cache production
+	loopAccesses       = 64      // Number of accesses in hashimoto loop
+)
+
+var (
+	C_epochLength = params.BlocksPerDay * 30 / 4 // 30 days worth of prime blocks
 )
 
 // cacheSize returns the size of the ethash verification cache that belongs to a certain
diff --git a/consensus/progpow/algorithm_progpow.go b/consensus/progpow/algorithm_progpow.go
index d98417b7e..63a77a159 100644
--- a/consensus/progpow/algorithm_progpow.go
+++ b/consensus/progpow/algorithm_progpow.go
@@ -18,7 +18,6 @@ package progpow
 
 import (
 	"encoding/binary"
-	"math"
 	"math/bits"
 
 	goLRU "github.com/hashicorp/golang-lru/v2"
@@ -33,7 +32,7 @@ const (
 	progpowDagLoads     = 4                     // Number of uint32 loads from the DAG per lane
 	progpowCntCache     = 11
 	progpowCntMath      = 18
-	progpowPeriodLength = math.MaxUint64
+	progpowPeriodLength = 10
 	progpowCntDag       = 64
 	progpowMixBytes     = 256
 )