diff --git a/dist/simpleSqlParser.js b/dist/simpleSqlParser.js
index ec50b9e..08bc255 100644
--- a/dist/simpleSqlParser.js
+++ b/dist/simpleSqlParser.js
@@ -836,6 +836,19 @@ var operator = alt(
 // A number
 var number = regex(/[-]?\d+\.?\d*/);
 
+// A duration
+var duration = seq(
+	number,
+	alt(
+		string('u'),
+		string('s'),
+		string('m'),
+		string('h'),
+		string('d'),
+		string('w')
+	)
+);
+
 
 
 /********************************************************************************************
@@ -896,6 +909,13 @@ var expression = seq(
 				column: null,
 			};
 		}),
+		duration.map(function(node) {
+			return {
+				expression: mkString(node),
+				table: null,
+				column: null,
+			};
+		}),
 		number.map(function(node) {
 			return {
 				expression: node,
diff --git a/dist/simpleSqlParser.min.js b/dist/simpleSqlParser.min.js
index 9250258..fb15dc5 100644
--- a/dist/simpleSqlParser.min.js
+++ b/dist/simpleSqlParser.min.js
@@ -1 +1 @@
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diff --git a/dist/simpleSqlParser.withoutDeps.js b/dist/simpleSqlParser.withoutDeps.js
index e4c0e94..dfde4c4 100644
--- a/dist/simpleSqlParser.withoutDeps.js
+++ b/dist/simpleSqlParser.withoutDeps.js
@@ -304,6 +304,19 @@ var operator = alt(
 // A number
 var number = regex(/[-]?\d+\.?\d*/);
 
+// A duration
+var duration = seq(
+	number,
+	alt(
+		string('u'),
+		string('s'),
+		string('m'),
+		string('h'),
+		string('d'),
+		string('w')
+	)
+);
+
 
 
 /********************************************************************************************
@@ -364,6 +377,13 @@ var expression = seq(
 				column: null,
 			};
 		}),
+		duration.map(function(node) {
+			return {
+				expression: mkString(node),
+				table: null,
+				column: null,
+			};
+		}),
 		number.map(function(node) {
 			return {
 				expression: node,
diff --git a/dist/simpleSqlParser.withoutDeps.min.js b/dist/simpleSqlParser.withoutDeps.min.js
index f3a46fe..460e071 100644
--- a/dist/simpleSqlParser.withoutDeps.min.js
+++ b/dist/simpleSqlParser.withoutDeps.min.js
@@ -1 +1 @@
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\ No newline at end of file
+!function(n){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=n();else if("function"==typeof define&&define.amd)define([],n);else{var e;e="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,e.simpleSqlParser=n()}}(function(){return function n(e,t,r){function i(o,s){if(!t[o]){if(!e[o]){var l="function"==typeof require&&require;if(!s&&l)return l(o,!0);if(u)return u(o,!0);var p=new Error("Cannot find module '"+o+"'");throw p.code="MODULE_NOT_FOUND",p}var a=t[o]={exports:{}};e[o][0].call(a.exports,function(n){var t=e[o][1][n];return i(t?t:n)},a,a.exports,n,e,t,r)}return t[o].exports}for(var u="function"==typeof require&&require,o=0;o<r.length;o++)i(r[o]);return i}({1:[function(n,e,t){"use strict";e.exports.sql2ast=n("./src/sql2ast.js"),e.exports.ast2sql=n("./src/ast2sql.js")},{"./src/ast2sql.js":2,"./src/sql2ast.js":3}],2:[function(n,e,t){"use strict";e.exports=function(n){function e(n){var e="SELECT ";return e+=n.select.map(function(n){return n.expression}).join(", ")}function t(n){var e="FROM ";return e+=n.from.map(function(n){return n.expression}).join(", ")}function r(n){return n.join.map(function(n){var e="";if("inner"===n.type)e+="INNER JOIN ";else if("left"===n.type)e+="LEFT JOIN ";else{if("right"!==n.type)return"";e+="RIGHT JOIN "}return e+=n.table,null!==n.alias&&(e+=" AS "+n.alias),e+=" ON ",e+=n.condition.expression}).join(" ")}function i(n){var e="";return null!==n.where&&(e+="WHERE "+n.where.expression),e}function u(n){var e="";return n.group.length>0&&(e+="GROUP BY ",e+=n.group.map(function(n){return n.expression}).join(", ")),e}function o(n){var e="";return n.order.length>0&&(e+="ORDER BY ",e+=n.order.map(function(n){return n.expression}).join(", ")),e}function s(n){var e="";return null!==n.limit&&(e+="LIMIT ",null!==n.limit.from&&(e+=n.limit.from+", "),e+=n.limit.nb),e}function l(n){return"INSERT INTO "+n.into.expression}function p(n){var e="",t=n.values.filter(function(n){return null!==n.target});return t.length>0&&(e+="(",e+=t.map(function(n){return n.target.expression}).join(", "),e+=") "),e+="VALUES (",e+=n.values.map(function(n){return n.value}).join(", "),e+=")"}function a(n){return"UPDATE "+n.table.expression}function f(n){var e="SET ";return e+=n.values.map(function(n){return n.target.expression+" = "+n.value}).join(", ")}if("object"!=typeof n||n.status!==!0)return!1;var c=n.value,m=[];if("select"===c.type)m.push(e(c)),m.push(t(c)),m.push(r(c)),m.push(i(c)),m.push(u(c)),m.push(o(c)),m.push(s(c));else if("insert"===c.type)m.push(l(c)),m.push(p(c));else if("update"===c.type)m.push(a(c)),m.push(f(c)),m.push(i(c));else{if("delete"!==c.type)return!1;m.push("DELETE"),m.push(t(c)),m.push(i(c))}return m.filter(function(n){return""!==n}).join(" ")}},{}],3:[function(n,e,t){(function(n){"use strict";function t(n,e){return"undefined"==typeof e?n.or(l.succeed([])):n.or(l.succeed(e))}function r(n){return n.join("")}function 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\ No newline at end of file
diff --git a/src/sql2ast.js b/src/sql2ast.js
index 2b6ac85..da4f992 100644
--- a/src/sql2ast.js
+++ b/src/sql2ast.js
@@ -151,6 +151,19 @@ var operator = alt(
 // A number
 var number = regex(/[-]?\d+\.?\d*/);
 
+// A duration
+var duration = seq(
+	number,
+	alt(
+		string('u'),
+		string('s'),
+		string('m'),
+		string('h'),
+		string('d'),
+		string('w')
+	)
+);
+
 
 
 /********************************************************************************************
@@ -211,6 +224,13 @@ var expression = seq(
 				column: null,
 			};
 		}),
+		duration.map(function(node) {
+			return {
+				expression: mkString(node),
+				table: null,
+				column: null,
+			};
+		}),
 		number.map(function(node) {
 			return {
 				expression: node,
diff --git a/tests/tests-select.js b/tests/tests-select.js
index e44ff61..023ba7c 100644
--- a/tests/tests-select.js
+++ b/tests/tests-select.js
@@ -362,6 +362,27 @@ var Select = [
 			limit: { from: null, nb: 1 },
 		},
 	},
+	{
+		c: 'Durations',
+		q: 'SELECT * FROM table WHERE this >= 15m',
+		a: {
+			type: 'select',
+			select: [
+				{ expression: '*', column: '*', table: null, alias: null, position: { start: 7, end: 8 } },
+			],
+			from: [
+				{ expression: 'table', table: 'table', alias: null, position: { start: 14, end: 19 } },
+			],
+			join: [],
+			where: {
+				expression: 'this >= 15m',
+				position: { start: 26, end: 37 },
+			},
+			group: [],
+			order: [],
+			limit: null,
+		},
+	},
 	{
 		c: 'Group by',
 		q: 'SELECT * FROM table GROUP BY col1, MONTH(col2), table.col3',