diff --git a/circuits/babyjub.circom b/circuits/babyjub.circom
index 73cb84c..537b1a0 100644
--- a/circuits/babyjub.circom
+++ b/circuits/babyjub.circom
@@ -87,7 +87,7 @@ template BabyPbk() {
     signal         output Ax;
     signal         output Ay;
 
-    var BASE8 = [
+    var BASE8[2] = [
         5299619240641551281634865583518297030282874472190772894086521144482721001553,
         16950150798460657717958625567821834550301663161624707787222815936182638968203
     ];
diff --git a/circuits/eddsa.circom b/circuits/eddsa.circom
index 1026774..bf126a7 100644
--- a/circuits/eddsa.circom
+++ b/circuits/eddsa.circom
@@ -122,7 +122,7 @@ template EdDSAVerifier(n) {
 
 // Calculate left side of equation left = S*B8
 
-    var BASE8 = [
+    var BASE8[2] = [
         5299619240641551281634865583518297030282874472190772894086521144482721001553,
         16950150798460657717958625567821834550301663161624707787222815936182638968203
     ];
diff --git a/circuits/eddsamimc.circom b/circuits/eddsamimc.circom
index aef5df5..5f0917a 100644
--- a/circuits/eddsamimc.circom
+++ b/circuits/eddsamimc.circom
@@ -100,7 +100,7 @@ template EdDSAMiMCVerifier() {
 
 // Calculate left side of equation left = S*B8
 
-    var BASE8 = [
+    var BASE8[2] = [
         5299619240641551281634865583518297030282874472190772894086521144482721001553,
         16950150798460657717958625567821834550301663161624707787222815936182638968203
     ];
diff --git a/circuits/eddsamimcsponge.circom b/circuits/eddsamimcsponge.circom
index af38d57..8b2577d 100644
--- a/circuits/eddsamimcsponge.circom
+++ b/circuits/eddsamimcsponge.circom
@@ -100,7 +100,7 @@ template EdDSAMiMCSpongeVerifier() {
 
 // Calculate left side of equation left = S*B8
 
-    var BASE8 = [
+    var BASE8[2] = [
         5299619240641551281634865583518297030282874472190772894086521144482721001553,
         16950150798460657717958625567821834550301663161624707787222815936182638968203
     ];
diff --git a/circuits/eddsaposeidon.circom b/circuits/eddsaposeidon.circom
index 0d9faa0..5ed63c9 100644
--- a/circuits/eddsaposeidon.circom
+++ b/circuits/eddsaposeidon.circom
@@ -99,7 +99,7 @@ template EdDSAPoseidonVerifier() {
 
 // Calculate left side of equation left = S*B8
 
-    var BASE8 = [
+    var BASE8[2] = [
         5299619240641551281634865583518297030282874472190772894086521144482721001553,
         16950150798460657717958625567821834550301663161624707787222815936182638968203
     ];
diff --git a/circuits/escalarmul.circom b/circuits/escalarmul.circom
index b3cc806..9cd13f7 100644
--- a/circuits/escalarmul.circom
+++ b/circuits/escalarmul.circom
@@ -71,7 +71,7 @@ template EscalarMulWindow(base, k) {
     signal input sel[4];
     signal output out[2];
 
-    var table;
+    var table[16][2];
     component mux;
     component adder;
 
diff --git a/circuits/escalarmulw4table.circom b/circuits/escalarmulw4table.circom
index d056e66..83498fb 100644
--- a/circuits/escalarmulw4table.circom
+++ b/circuits/escalarmulw4table.circom
@@ -33,7 +33,7 @@ function EscalarMulW4Table(base, k) {
     var i;
     var p[2];
 
-    var dbl = base;
+    var dbl[2] = base;
 
     for (i=0; i<k*4; i++) {
         dbl = pointAdd(dbl[0], dbl[1], dbl[0], dbl[1]);
diff --git a/circuits/mimc.circom b/circuits/mimc.circom
index 9ab478e..99fa185 100644
--- a/circuits/mimc.circom
+++ b/circuits/mimc.circom
@@ -22,7 +22,7 @@ template MiMC7(nrounds) {
     signal input k;
     signal output out;
 
-    var c = [
+    var c[91] = [
         0,
         20888961410941983456478427210666206549300505294776164667214940546594746570981,
         15265126113435022738560151911929040668591755459209400716467504685752745317193,
diff --git a/circuits/mimcsponge.circom b/circuits/mimcsponge.circom
index 0ce0c42..14ba399 100644
--- a/circuits/mimcsponge.circom
+++ b/circuits/mimcsponge.circom
@@ -42,7 +42,7 @@ template MiMCFeistel(nrounds) {
     signal output xR_out;
 
     // doesn't contain the first and last round constants, which are always zero
-    var c_partial = [
+    var c_partial[218] = [
       7120861356467848435263064379192047478074060781135320967663101236819528304084,
       5024705281721889198577876690145313457398658950011302225525409148828000436681,
       17980351014018068290387269214713820287804403312720763401943303895585469787384,
diff --git a/circuits/pedersen.circom b/circuits/pedersen.circom
index c890426..245d5d8 100644
--- a/circuits/pedersen.circom
+++ b/circuits/pedersen.circom
@@ -176,7 +176,7 @@ template Pedersen(n) {
     signal input in[n];
     signal output out[2];
 
-    var BASE = [
+    var BASE[10][2] = [
         [10457101036533406547632367118273992217979173478358440826365724437999023779287,19824078218392094440610104313265183977899662750282163392862422243483260492317],
         [2671756056509184035029146175565761955751135805354291559563293617232983272177,2663205510731142763556352975002641716101654201788071096152948830924149045094],
         [5802099305472655231388284418920769829666717045250560929368476121199858275951,5980429700218124965372158798884772646841287887664001482443826541541529227896],
diff --git a/circuits/pedersen_old.circom b/circuits/pedersen_old.circom
index 35d23a5..9ddc387 100644
--- a/circuits/pedersen_old.circom
+++ b/circuits/pedersen_old.circom
@@ -28,7 +28,7 @@ template Pedersen(n) {
 
     component escalarMuls[nexps];
 
-    var PBASE = [
+    var PBASE[10][2] = [
         [10457101036533406547632367118273992217979173478358440826365724437999023779287,19824078218392094440610104313265183977899662750282163392862422243483260492317],
         [2671756056509184035029146175565761955751135805354291559563293617232983272177,2663205510731142763556352975002641716101654201788071096152948830924149045094],
         [5802099305472655231388284418920769829666717045250560929368476121199858275951,5980429700218124965372158798884772646841287887664001482443826541541529227896],
diff --git a/circuits/poseidon.circom b/circuits/poseidon.circom
index 102fdba..aac8d03 100644
--- a/circuits/poseidon.circom
+++ b/circuits/poseidon.circom
@@ -43,7 +43,7 @@ template Mix(t, M) {
 
 template Poseidon(nInputs, t, nRoundsF, nRoundsP) {
 
-    var C = [
+    var C[65] = [
         14397397413755236225575615486459253198602422701513067526754101844196324375522,
         10405129301473404666785234951972711717481302463898292859783056520670200613128,
         5179144822360023508491245509308555580251733042407187134628755730783052214509,
@@ -111,7 +111,7 @@ template Poseidon(nInputs, t, nRoundsF, nRoundsP) {
         10635360132728137321700090133109897687122647659471659996419791842933639708516
     ];
 
-    var M = [
+    var M[6][6] = [
         [
             19167410339349846567561662441069598364702008768579734801591448511131028229281,
             14183033936038168803360723133013092560869148726790180682363054735190196956789,
diff --git a/circuits/sha256/constants.circom b/circuits/sha256/constants.circom
index bf69598..7b375d5 100644
--- a/circuits/sha256/constants.circom
+++ b/circuits/sha256/constants.circom
@@ -19,7 +19,7 @@
 
 template H(x) {
     signal output out[32];
-    var c = [0x6a09e667,
+    var c[8] = [0x6a09e667,
              0xbb67ae85,
              0x3c6ef372,
              0xa54ff53a,
@@ -35,7 +35,7 @@ template H(x) {
 
 template K(x) {
     signal output out[32];
-    var c = [
+    var c[64] = [
         0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
         0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
         0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
diff --git a/src/poseidon.js b/src/poseidon.js
index 5c75dac..479e51c 100644
--- a/src/poseidon.js
+++ b/src/poseidon.js
@@ -50,7 +50,7 @@ exports.getMatrix = (t, seed, nRounds) => {
     for (let i=0; i<t; i++) {
         M[i] = new Array(t);
         for (let j=0; j<t; j++) {
-            M[i][j] = F.normalize(F.inverse(F.sub(cmatrix[i], cmatrix[t+j])));
+            M[i][j] = F.normalize(F.inv(F.sub(cmatrix[i], cmatrix[t+j])));
         }
     }
     return M;
diff --git a/test/binsum.js b/test/binsum.js
index c0e94a8..92f04f6 100644
--- a/test/binsum.js
+++ b/test/binsum.js
@@ -7,7 +7,7 @@ const bigInt = require("big-integer");
 
 const assert = chai.assert;
 
-describe("Sum test", function () {
+describe("Binary sum test", function () {
 
     this.timeout(100000000);
 
diff --git a/test/circuits/escalarmul_test.circom b/test/circuits/escalarmul_test.circom
index c15535d..1af53ac 100644
--- a/test/circuits/escalarmul_test.circom
+++ b/test/circuits/escalarmul_test.circom
@@ -6,7 +6,7 @@ template Main() {
     signal input in;
     signal output out[2];
 
-    var base = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
+    var base[2] = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
             16950150798460657717958625567821834550301663161624707787222815936182638968203];
 
 
diff --git a/test/circuits/escalarmul_test_min.circom b/test/circuits/escalarmul_test_min.circom
index 6973701..2b8c7ba 100644
--- a/test/circuits/escalarmul_test_min.circom
+++ b/test/circuits/escalarmul_test_min.circom
@@ -7,8 +7,8 @@ template Main() {
 
     var i;
 
-    var base = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
-                16950150798460657717958625567821834550301663161624707787222815936182638968203];
+    var base[2] = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
+                   16950150798460657717958625567821834550301663161624707787222815936182638968203];
 
     component escalarMul = EscalarMul(256, base);
 
diff --git a/test/circuits/escalarmulfix_test.circom b/test/circuits/escalarmulfix_test.circom
index 9a9d777..7d80b79 100644
--- a/test/circuits/escalarmulfix_test.circom
+++ b/test/circuits/escalarmulfix_test.circom
@@ -6,8 +6,8 @@ template Main() {
     signal input e;
     signal output out[2];
 
-    var base = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
-            16950150798460657717958625567821834550301663161624707787222815936182638968203]
+    var base[2] = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
+                   16950150798460657717958625567821834550301663161624707787222815936182638968203]
 
 
     component n2b = Num2Bits(253);
diff --git a/test/circuits/escalarmulw4table.circom b/test/circuits/escalarmulw4table.circom
index 85c5507..43143b6 100644
--- a/test/circuits/escalarmulw4table.circom
+++ b/test/circuits/escalarmulw4table.circom
@@ -1,6 +1,6 @@
 include "../../circuits/escalarmulw4table.circom";
 
-var base = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
+var base[2] = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
             16950150798460657717958625567821834550301663161624707787222815936182638968203]
 
 component main = EscalarMulW4Table(base, 0);
diff --git a/test/circuits/escalarmulw4table_test.circom b/test/circuits/escalarmulw4table_test.circom
index 852628d..9f6777f 100644
--- a/test/circuits/escalarmulw4table_test.circom
+++ b/test/circuits/escalarmulw4table_test.circom
@@ -4,10 +4,10 @@ include "../../circuits/escalarmulw4table.circom";
 template Main() {
     signal input in;
     signal output out[16][2];
-    var base = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
+    var base[2] = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
                 16950150798460657717958625567821834550301663161624707787222815936182638968203];
 
-    var escalarMul = EscalarMulW4Table(base, 0);
+    var escalarMul[16][2] = EscalarMulW4Table(base, 0);
     for (var i=0; i<16; i++) {
         out[i][0] <== escalarMul[i][0]*in;
         out[i][1] <== escalarMul[i][1]*in;
diff --git a/test/circuits/escalarmulw4table_test3.circom b/test/circuits/escalarmulw4table_test3.circom
index 52933fa..d41d827 100644
--- a/test/circuits/escalarmulw4table_test3.circom
+++ b/test/circuits/escalarmulw4table_test3.circom
@@ -4,10 +4,10 @@ include "../../circuits/escalarmulw4table.circom";
 template Main() {
     signal input in;
     signal output out[16][2];
-    var base = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
-                16950150798460657717958625567821834550301663161624707787222815936182638968203];
+    var base[2] = [5299619240641551281634865583518297030282874472190772894086521144482721001553,
+                   16950150798460657717958625567821834550301663161624707787222815936182638968203];
 
-    var escalarMul = EscalarMulW4Table(base, 3);
+    var escalarMul[16][2] = EscalarMulW4Table(base, 3);
     for (var i=0; i<16; i++) {
         out[i][0] <== escalarMul[i][0]*in;
         out[i][1] <== escalarMul[i][1]*in;