diff --git a/src/helpers/Logger.sol b/src/helpers/Logger.sol
index b532de34..59839c0f 100644
--- a/src/helpers/Logger.sol
+++ b/src/helpers/Logger.sol
@@ -24,7 +24,7 @@ library Logger {
     }
   }
 
-  function logUint(uint intToLog) internal view {
+  function logUint(uint256 intToLog) internal view {
     if (block.chainid == 260) {
       console.logUint(intToLog);
     }
diff --git a/src/libraries/JsmnSolLib.sol b/src/libraries/JsmnSolLib.sol
index 8752e3b0..b70fe193 100644
--- a/src/libraries/JsmnSolLib.sol
+++ b/src/libraries/JsmnSolLib.sol
@@ -31,27 +31,27 @@ library JsmnSolLib {
     PRIMITIVE
   }
 
-  uint constant RETURN_SUCCESS = 0;
-  uint constant RETURN_ERROR_INVALID_JSON = 1;
-  uint constant RETURN_ERROR_PART = 2;
-  uint constant RETURN_ERROR_NO_MEM = 3;
+  uint256 constant RETURN_SUCCESS = 0;
+  uint256 constant RETURN_ERROR_INVALID_JSON = 1;
+  uint256 constant RETURN_ERROR_PART = 2;
+  uint256 constant RETURN_ERROR_NO_MEM = 3;
 
   struct Token {
     JsmnType jsmnType;
-    uint start;
+    uint256 start;
     bool startSet;
-    uint end;
+    uint256 end;
     bool endSet;
     uint8 size;
   }
 
   struct Parser {
-    uint pos;
-    uint toknext;
-    int toksuper;
+    uint256 pos;
+    uint256 toknext;
+    int256 toksuper;
   }
 
-  function init(uint length) internal pure returns (Parser memory, Token[] memory) {
+  function init(uint256 length) internal pure returns (Parser memory, Token[] memory) {
     Parser memory p = Parser(0, 0, -1);
     Token[] memory t = new Token[](length);
     return (p, t);
@@ -68,7 +68,7 @@ library JsmnSolLib {
     return (true, token);
   }
 
-  function fillToken(Token memory token, JsmnType jsmnType, uint start, uint end) internal pure {
+  function fillToken(Token memory token, JsmnType jsmnType, uint256 start, uint256 end) internal pure {
     token.jsmnType = jsmnType;
     token.start = start;
     token.startSet = true;
@@ -78,7 +78,7 @@ library JsmnSolLib {
   }
 
   function parseString(Parser memory parser, Token[] memory tokens, bytes memory s) internal pure returns (uint) {
-    uint start = parser.pos;
+    uint256 start = parser.pos;
     bool success;
     Token memory token;
     parser.pos++;
@@ -124,7 +124,7 @@ library JsmnSolLib {
 
   function parsePrimitive(Parser memory parser, Token[] memory tokens, bytes memory s) internal pure returns (uint) {
     bool found = false;
-    uint start = parser.pos;
+    uint256 start = parser.pos;
     bool success;
     bytes1 c;
     Token memory token;
@@ -155,16 +155,16 @@ library JsmnSolLib {
     return RETURN_SUCCESS;
   }
 
-  function parse(string memory json, uint numberElements) internal pure returns (uint, Token[] memory tokens, uint) {
+  function parse(string memory json, uint256 numberElements) internal pure returns (uint, Token[] memory tokens, uint) {
     bytes memory s = bytes(json);
     bool success;
     Parser memory parser;
     (parser, tokens) = init(numberElements);
 
     // Token memory token;
-    uint r;
-    uint count = parser.toknext;
-    uint i;
+    uint256 r;
+    uint256 count = parser.toknext;
+    uint256 i;
     Token memory token;
 
     for (; parser.pos < s.length; parser.pos++) {
@@ -296,10 +296,10 @@ library JsmnSolLib {
     return (RETURN_SUCCESS, tokens, parser.toknext);
   }
 
-  function getBytes(string memory json, uint start, uint end) internal pure returns (string memory) {
+  function getBytes(string memory json, uint256 start, uint256 end) internal pure returns (string memory) {
     bytes memory s = bytes(json);
     bytes memory result = new bytes(end - start);
-    for (uint i = start; i < end; i++) {
+    for (uint256 i = start; i < end; i++) {
       result[i - start] = s[i];
     }
     return string(result);
@@ -311,12 +311,12 @@ library JsmnSolLib {
   }
 
   // parseInt(parseFloat*10^_b)
-  function parseInt(string memory _a, uint _b) internal pure returns (int) {
+  function parseInt(string memory _a, uint256 _b) internal pure returns (int) {
     bytes memory bresult = bytes(_a);
-    int mint = 0;
+    int256 mint = 0;
     bool decimals = false;
     bool negative = false;
-    for (uint i = 0; i < bresult.length; i++) {
+    for (uint256 i = 0; i < bresult.length; i++) {
       if ((i == 0) && (bresult[i] == "-")) {
         negative = true;
       }
@@ -334,16 +334,16 @@ library JsmnSolLib {
     return mint;
   }
 
-  function uint2str(uint i) internal pure returns (string memory) {
+  function uint2str(uint256 i) internal pure returns (string memory) {
     if (i == 0) return "0";
-    uint j = i;
-    uint len;
+    uint256 j = i;
+    uint256 len;
     while (j != 0) {
       len++;
       j /= 10;
     }
     bytes memory bstr = new bytes(len);
-    uint k = len - 1;
+    uint256 k = len - 1;
     while (i != 0) {
       bstr[k--] = bytes1(uint8(48 + (i % 10)));
       i /= 10;
@@ -362,9 +362,9 @@ library JsmnSolLib {
   function strCompare(string memory _a, string memory _b) internal pure returns (int) {
     bytes memory a = bytes(_a);
     bytes memory b = bytes(_b);
-    uint minLength = a.length;
+    uint256 minLength = a.length;
     if (b.length < minLength) minLength = b.length;
-    for (uint i = 0; i < minLength; i++)
+    for (uint256 i = 0; i < minLength; i++)
       if (a[i] < b[i]) return -1;
       else if (a[i] > b[i]) return 1;
     if (a.length < b.length) return -1;
diff --git a/src/validators/WebAuthValidator.sol b/src/validators/WebAuthValidator.sol
index c2e24c09..457ac76f 100644
--- a/src/validators/WebAuthValidator.sol
+++ b/src/validators/WebAuthValidator.sol
@@ -81,7 +81,7 @@ contract WebAuthValidator is VerifierCaller, IModuleValidator {
 
     // parse out the important fields (type, challenge, and origin): https://goo.gl/yabPex
     // TODO: test if the parse fails for more than 10 elements, otherwise can have a malicious header
-    (uint returnValue, JsmnSolLib.Token[] memory tokens, uint actualNum) = JsmnSolLib.parse(clientDataJSON, 20);
+    (uint256 returnValue, JsmnSolLib.Token[] memory tokens, uint256 actualNum) = JsmnSolLib.parse(clientDataJSON, 20);
     if (returnValue != 0) {
       return false;
     }