diff --git a/parsers/parsers.go b/parsers/parsers.go
index f5ec269..ab33ce0 100644
--- a/parsers/parsers.go
+++ b/parsers/parsers.go
@@ -34,7 +34,6 @@ type PkString struct {
 	DomainSize int                 `json:"domainSize"`
 	PolsA      []map[string]string `json:"polsA"`
 	PolsB      []map[string]string `json:"polsB"`
-	PolsC      []map[string]string `json:"polsC"`
 }
 
 // WitnessString contains the Witness in string representation
@@ -149,10 +148,6 @@ func pkStringToPk(ps PkString) (*types.Pk, error) {
 	if err != nil {
 		return nil, err
 	}
-	p.PolsC, err = polsStringToBigInt(ps.PolsC)
-	if err != nil {
-		return nil, err
-	}
 
 	return &p, nil
 }
diff --git a/prover/prover.go b/prover/prover.go
index 67a401e..d208903 100644
--- a/prover/prover.go
+++ b/prover/prover.go
@@ -13,36 +13,6 @@ import (
 	//"fmt"
 )
 
-// Proof is the data structure of the Groth16 zkSNARK proof
-type Proof struct {
-	A *bn256.G1
-	B *bn256.G2
-	C *bn256.G1
-}
-
-// Pk holds the data structure of the ProvingKey
-type Pk struct {
-	A          []*bn256.G1
-	B2         []*bn256.G2
-	B1         []*bn256.G1
-	C          []*bn256.G1
-	NVars      int
-	NPublic    int
-	VkAlpha1   *bn256.G1
-	VkDelta1   *bn256.G1
-	VkBeta1    *bn256.G1
-	VkBeta2    *bn256.G2
-	VkDelta2   *bn256.G2
-	HExps      []*bn256.G1
-	DomainSize int
-	PolsA      []map[int]*big.Int
-	PolsB      []map[int]*big.Int
-	PolsC      []map[int]*big.Int
-}
-
-// Witness contains the witness
-type Witness []*big.Int
-
 // Group Size
 const (
 	GSIZE = 6
diff --git a/types/types.go b/types/types.go
index 2718a22..c28c81f 100644
--- a/types/types.go
+++ b/types/types.go
@@ -83,7 +83,6 @@ type Pk struct {
 	DomainSize int
 	PolsA      []map[int]*big.Int
 	PolsB      []map[int]*big.Int
-	PolsC      []map[int]*big.Int
 }
 
 // Witness contains the witness