diff --git a/internal/block/block.go b/internal/block/block.go
index a7eb69a..ae8cea1 100644
--- a/internal/block/block.go
+++ b/internal/block/block.go
@@ -9,4 +9,5 @@ type Block struct {
 // Extrinsic represents the block extrinsic data
 type Extrinsic struct {
 	ET []*TicketProof
+	ED *Dispute
 }
diff --git a/internal/block/dispute.go b/internal/block/dispute.go
new file mode 100644
index 0000000..f3d9410
--- /dev/null
+++ b/internal/block/dispute.go
@@ -0,0 +1,39 @@
+package block
+
+import "github.com/eigerco/strawberry/internal/crypto"
+
+const (
+	judgmentSignatureSize = 64   // Size of Ed25519 signature
+)
+
+type Dispute struct {
+	Verdicts []Verdict
+	Culprits []Culprit
+	Faults   []Fault
+}
+
+type Verdict struct {
+	ReportHash [32]byte   // H, hash of the work report
+	EpochIndex uint32     // ⌊τ/E⌋ - N2, epoch index
+	Judgments  []Judgment // ⟦{⊺,⊥},NV,E⟧⌊2/3V⌋+1
+}
+
+type Culprit struct {
+	ReportHash                crypto.Hash                 // H, hash of the work report
+	ValidatorEd25519PublicKey crypto.Ed25519PublicKey     // He
+	Signature                 [judgmentSignatureSize]byte // E
+}
+
+type Fault struct {
+	ReportHash                crypto.Hash                 // H, hash of the work report
+	IsValid                   bool                        // {⊺,⊥}
+	ValidatorEd25519PublicKey crypto.Ed25519PublicKey     // He
+	Signature                 [judgmentSignatureSize]byte // E
+}
+
+// Judgment represents a single judgment with a signature
+type Judgment struct {
+	IsValid        bool                        // v: {⊺,⊥}
+	ValidatorIndex uint16                      // i: NV
+	Signature      [judgmentSignatureSize]byte // s: E
+}