diff --git a/go.mod b/go.mod
index 1299b9a..706eea1 100644
--- a/go.mod
+++ b/go.mod
@@ -5,10 +5,10 @@ go 1.23.2
 toolchain go1.23.4
 
 require (
-	github.com/consensys/gnark-crypto v0.14.1-0.20241010154951-6638408a49f3
+	github.com/consensys/gnark-crypto v0.14.1-0.20241213223322-afee1955665f
 	github.com/frankban/quicktest v1.14.6
 	github.com/iden3/go-iden3-crypto v0.0.17
-	github.com/vocdoni/vocdoni-z-sandbox v0.0.0-20241203073504-acbb1b626579
+	github.com/vocdoni/vocdoni-z-sandbox v0.0.0-20241212172703-15f6d0594b8e
 	go.vocdoni.io/dvote v1.10.2-0.20241024102542-c1ce6d744bc5
 	golang.org/x/crypto v0.28.0
 )
@@ -24,7 +24,7 @@ require (
 	github.com/cockroachdb/pebble v1.1.2 // indirect
 	github.com/cockroachdb/redact v1.1.5 // indirect
 	github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06 // indirect
-	github.com/consensys/bavard v0.1.22 // indirect
+	github.com/consensys/bavard v0.1.24 // indirect
 	github.com/getsentry/sentry-go v0.27.0 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/snappy v0.0.5-0.20220116011046-fa5810519dcb // indirect
diff --git a/go.sum b/go.sum
index 66fb917..6227b03 100644
--- a/go.sum
+++ b/go.sum
@@ -20,10 +20,10 @@ github.com/cockroachdb/redact v1.1.5 h1:u1PMllDkdFfPWaNGMyLD1+so+aq3uUItthCFqzwP
 github.com/cockroachdb/redact v1.1.5/go.mod h1:BVNblN9mBWFyMyqK1k3AAiSxhvhfK2oOZZ2lK+dpvRg=
 github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06 h1:zuQyyAKVxetITBuuhv3BI9cMrmStnpT18zmgmTxunpo=
 github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06/go.mod h1:7nc4anLGjupUW/PeY5qiNYsdNXj7zopG+eqsS7To5IQ=
-github.com/consensys/bavard v0.1.22 h1:Uw2CGvbXSZWhqK59X0VG/zOjpTFuOMcPLStrp1ihI0A=
-github.com/consensys/bavard v0.1.22/go.mod h1:k/zVjHHC4B+PQy1Pg7fgvG3ALicQw540Crag8qx+dZs=
-github.com/consensys/gnark-crypto v0.14.1-0.20241010154951-6638408a49f3 h1:jVatckGR1s3OHs4QnGsppX+w2P3eedlWxi7ZFq56rjA=
-github.com/consensys/gnark-crypto v0.14.1-0.20241010154951-6638408a49f3/go.mod h1:F/hJyWBcTr1sWeifAKfEN3aVb3G4U5zheEC8IbWQun4=
+github.com/consensys/bavard v0.1.24 h1:Lfe+bjYbpaoT7K5JTFoMi5wo9V4REGLvQQbHmatoN2I=
+github.com/consensys/bavard v0.1.24/go.mod h1:k/zVjHHC4B+PQy1Pg7fgvG3ALicQw540Crag8qx+dZs=
+github.com/consensys/gnark-crypto v0.14.1-0.20241213223322-afee1955665f h1:fSN/SblYo81hUUlrwfzMZ240Cxuxe0TkF7uQelxZgjI=
+github.com/consensys/gnark-crypto v0.14.1-0.20241213223322-afee1955665f/go.mod h1:ePFa23CZLMRMHxQpY5nMaiAZ3yuEIayaB8ElEvlwLEs=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -78,8 +78,8 @@ github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU
 github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
-github.com/vocdoni/vocdoni-z-sandbox v0.0.0-20241203073504-acbb1b626579 h1:v2SQztawwX7nto+nHXw3ed4r8WYa+suQByzz4LPn41k=
-github.com/vocdoni/vocdoni-z-sandbox v0.0.0-20241203073504-acbb1b626579/go.mod h1:zKgPxmIDwNK7+6EJu22WIR6CV4zL8Umh+tESWnP9+kg=
+github.com/vocdoni/vocdoni-z-sandbox v0.0.0-20241212172703-15f6d0594b8e h1:sogZy0UOcDvg4mAeU0vXFDNgymLd4WqwfQImlEdevqw=
+github.com/vocdoni/vocdoni-z-sandbox v0.0.0-20241212172703-15f6d0594b8e/go.mod h1:8GkK2SCGHZ8d8SE4AsWWnVnUQxI8vx75KJDCv2yrZlY=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 go.vocdoni.io/dvote v1.10.2-0.20241024102542-c1ce6d744bc5 h1:22esW3YedMfoEOx0Chc2qhrooMBDRHsasJfGytESxo4=
diff --git a/hash.go b/hash.go
index 5f50a3a..42528f8 100644
--- a/hash.go
+++ b/hash.go
@@ -7,7 +7,7 @@ import (
 	mimc_bls12_377 "github.com/consensys/gnark-crypto/ecc/bls12-377/fr/mimc"
 	mimc_bn254 "github.com/consensys/gnark-crypto/ecc/bn254/fr/mimc"
 	"github.com/iden3/go-iden3-crypto/poseidon"
-	multiposeidon "github.com/vocdoni/vocdoni-z-sandbox/hash/poseidon"
+	multiposeidon "github.com/vocdoni/vocdoni-z-sandbox/crypto/hash/poseidon"
 	"golang.org/x/crypto/blake2b"
 )