diff --git a/README.md b/README.md
index 73cc188..6a6fbe4 100644
--- a/README.md
+++ b/README.md
@@ -396,12 +396,12 @@ printf("|%-*.*d|", -4, 2, 1);        // |01  | width=4 prec=2 value=1 flags='-'
 A negative precision is discarded:
 
 ```C
-printf("|%*s|\n", 4, "sheetjs");       // |sheetjs|  width=4
-printf("|%*.*s|\n", 4,  3, "sheetjs"); // | she|     width=4 prec=3
-printf("|%*.*s|\n", 4,  2, "sheetjs"); // |  sh|     width=4 prec=2
-printf("|%*.*s|\n", 4,  1, "sheetjs"); // |   s|     width=4 prec=1
-printf("|%*.*s|\n", 4,  0, "sheetjs"); // |    |     width=4 prec=0
-printf("|%*.*s|\n", 4, -1, "sheetjs"); // |sheetjs|  width=4 (prec ignored)
+printf("|%*s|", 4, "sheetjs");       // |sheetjs|  width=4
+printf("|%*.*s|", 4,  3, "sheetjs"); // | she|     width=4 prec=3
+printf("|%*.*s|", 4,  2, "sheetjs"); // |  sh|     width=4 prec=2
+printf("|%*.*s|", 4,  1, "sheetjs"); // |   s|     width=4 prec=1
+printf("|%*.*s|", 4,  0, "sheetjs"); // |    |     width=4 prec=0
+printf("|%*.*s|", 4, -1, "sheetjs"); // |sheetjs|  width=4 (prec ignored)
 ```
 
 
@@ -544,9 +544,9 @@ When a length specifier implies a certain size (such as `hh` for a single-byte
 integer), the number will be converted before rendering strings.  For example:
 
 ```C
-printf("%1$02hhx %1$02hx %1$02lx %1$02llx\n", 256);       // 00 100 100 100
-printf("%1$02hhx %1$02hx %1$02lx %1$02llx\n", 4096);      // 00 1000 1000 1000
-printf("%1$02hhx %1$02hx %1$02lx %1$02llx\n", 65536);     // 00 00 10000 10000
+printf("%1$02hhx %1$02hx %1$02lx %1$02llx", 256);       // |00 100 100 100|
+printf("%1$02hhx %1$02hx %1$02lx %1$02llx", 4096);      // |00 1000 1000 1000|
+printf("%1$02hhx %1$02hx %1$02lx %1$02llx", 65536);     // |00 00 10000 10000|
 ```
 
 Values are restricted by first limiting the result to a specified number of
diff --git a/bits/01_version.js b/bits/01_version.js
index 908ae42..3633660 100644
--- a/bits/01_version.js
+++ b/bits/01_version.js
@@ -1 +1 @@
-PRINTJ.version = '1.0.1';
+PRINTJ.version = '1.1.0';
diff --git a/bits/50_doit.js b/bits/50_doit.js
index 1a92acf..a359aea 100644
--- a/bits/50_doit.js
+++ b/bits/50_doit.js
@@ -70,6 +70,8 @@ function doit(t/*:ParsedFmt*/, args/*:Array<any>*/)/*:string*/ {
 #include "54_convmisc.js"
 		}
 
+		if(width < 0) { width = -width; flags += "-"; }
+
 		if(isnum == -1) {
 #include "60_integer.js"
 		} else if(isnum > 0) {
diff --git a/ctest/printj.js b/ctest/printj.js
index 7a65d48..626c1c7 100644
--- a/ctest/printj.js
+++ b/ctest/printj.js
@@ -23,7 +23,7 @@ var PRINTJ;
 	/*jshint ignore:end */
 }(function(PRINTJ) {
 
-PRINTJ.version = '1.0.1';
+PRINTJ.version = '1.1.0';
 
 function tokenize(fmt) {
 	var out = [];
@@ -314,6 +314,8 @@ function doit(t, args) {
 
 		}
 
+		if(width < 0) { width = -width; flags += "-"; }
+
 		if(isnum == -1) {
 
 			Vnum = Number(arg);
diff --git a/ctest/test.js b/ctest/test.js
index 546b239..9b1c71c 100644
--- a/ctest/test.js
+++ b/ctest/test.js
@@ -171,4 +171,23 @@ describe('special cases', function() {
 		assert.equal(sprintf("|%1$b|%1$B|%1$d|%1$D|%1$i|%1$o|%1$O|%1$u|%1$U|%1$x|%1$X|", undefined), "|0|0|0|0|0|0|0|0|0|0|0|");
 		assert.equal(sprintf("|%1$b|%1$B|%1$d|%1$D|%1$i|%1$o|%1$O|%1$u|%1$U|%1$x|%1$X|", null), "|0|0|0|0|0|0|0|0|0|0|0|");
 	});
+	it('handles dynamic specifiers', function() {
+		assert.equal(sprintf("|%5s|", "sheetjs"), "|sheetjs|");
+		assert.equal(sprintf("|%*s|", 5, "sheetjs"), "|sheetjs|");
+		assert.equal(sprintf("|%2$*1$s|", 5, "sheetjs", 10), "|sheetjs|");
+		assert.equal(sprintf("|%10s|", "sheetjs"), "|   sheetjs|");
+		assert.equal(sprintf("|%2$*3$s|", 5, "sheetjs", 10), "|   sheetjs|");
+		assert.equal(sprintf("|%0*.*d|", 4, 2, 1), "|  01|");
+		assert.equal(sprintf("|%1$0*3$.*2$d|", 1, 2, 4), "|  01|");
+		assert.equal(sprintf("|%*.*d|",   4, 2, 1), "|  01|");
+		assert.equal(sprintf("|%-*.*d|",  4, 2, 1), "|01  |");
+		assert.equal(sprintf("|%*.*d|",  -4, 2, 1), "|01  |");
+		assert.equal(sprintf("|%-*.*d|", -4, 2, 1), "|01  |");
+		assert.equal(sprintf("|%*s|", 4, "sheetjs"), "|sheetjs|");
+		assert.equal(sprintf("|%*.*s|", 4,  3, "sheetjs"), "| she|");
+		assert.equal(sprintf("|%*.*s|", 4,  2, "sheetjs"), "|  sh|");
+		assert.equal(sprintf("|%*.*s|", 4,  1, "sheetjs"), "|   s|");
+		assert.equal(sprintf("|%*.*s|", 4,  0, "sheetjs"), "|    |");
+		assert.equal(sprintf("|%*.*s|", 4, -1, "sheetjs"), "|sheetjs|");
+	});
 });
diff --git a/package.json b/package.json
index ac1663d..ce106dc 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "printj",
-	"version": "1.0.2",
+	"version": "1.1.0",
 	"author": "sheetjs",
 	"description": "Pure-JS printf",
 	"keywords": [ "printf", "sprintf", "format", "string" ],
@@ -12,9 +12,10 @@
 	"dependencies": {
 	},
 	"devDependencies": {
-		"mocha":"",
-		"@sheetjs/uglify-js":"",
-		"@types/node":"",
+		"mocha":"~2.5.3",
+		"blanket": "~1.2.3",
+		"@sheetjs/uglify-js":"~2.7.3",
+		"@types/node":"^8.0.7",
 		"dtslint": "^0.1.2",
 		"typescript": "2.2.0"
 	},
diff --git a/printj.flow.js b/printj.flow.js
index 1a4c8b2..539d72d 100644
--- a/printj.flow.js
+++ b/printj.flow.js
@@ -25,7 +25,7 @@ var PRINTJ/*:PRINTJModule*/;
 	/*jshint ignore:end */
 }(function(PRINTJ/*:PRINTJModule*/) {
 
-PRINTJ.version = '1.0.1';
+PRINTJ.version = '1.1.0';
 
 function tokenize(fmt/*:string*/)/*:ParsedFmt*/ {
 	var out/*:ParsedFmt*/ = [];
@@ -317,6 +317,8 @@ function doit(t/*:ParsedFmt*/, args/*:Array<any>*/)/*:string*/ {
 
 		}
 
+		if(width < 0) { width = -width; flags += "-"; }
+
 		if(isnum == -1) {
 
 			Vnum = Number(arg);
diff --git a/printj.js b/printj.js
index 7a65d48..626c1c7 100644
--- a/printj.js
+++ b/printj.js
@@ -23,7 +23,7 @@ var PRINTJ;
 	/*jshint ignore:end */
 }(function(PRINTJ) {
 
-PRINTJ.version = '1.0.1';
+PRINTJ.version = '1.1.0';
 
 function tokenize(fmt) {
 	var out = [];
@@ -314,6 +314,8 @@ function doit(t, args) {
 
 		}
 
+		if(width < 0) { width = -width; flags += "-"; }
+
 		if(isnum == -1) {
 
 			Vnum = Number(arg);
diff --git a/test.js b/test.js
index 546b239..9b1c71c 100644
--- a/test.js
+++ b/test.js
@@ -171,4 +171,23 @@ describe('special cases', function() {
 		assert.equal(sprintf("|%1$b|%1$B|%1$d|%1$D|%1$i|%1$o|%1$O|%1$u|%1$U|%1$x|%1$X|", undefined), "|0|0|0|0|0|0|0|0|0|0|0|");
 		assert.equal(sprintf("|%1$b|%1$B|%1$d|%1$D|%1$i|%1$o|%1$O|%1$u|%1$U|%1$x|%1$X|", null), "|0|0|0|0|0|0|0|0|0|0|0|");
 	});
+	it('handles dynamic specifiers', function() {
+		assert.equal(sprintf("|%5s|", "sheetjs"), "|sheetjs|");
+		assert.equal(sprintf("|%*s|", 5, "sheetjs"), "|sheetjs|");
+		assert.equal(sprintf("|%2$*1$s|", 5, "sheetjs", 10), "|sheetjs|");
+		assert.equal(sprintf("|%10s|", "sheetjs"), "|   sheetjs|");
+		assert.equal(sprintf("|%2$*3$s|", 5, "sheetjs", 10), "|   sheetjs|");
+		assert.equal(sprintf("|%0*.*d|", 4, 2, 1), "|  01|");
+		assert.equal(sprintf("|%1$0*3$.*2$d|", 1, 2, 4), "|  01|");
+		assert.equal(sprintf("|%*.*d|",   4, 2, 1), "|  01|");
+		assert.equal(sprintf("|%-*.*d|",  4, 2, 1), "|01  |");
+		assert.equal(sprintf("|%*.*d|",  -4, 2, 1), "|01  |");
+		assert.equal(sprintf("|%-*.*d|", -4, 2, 1), "|01  |");
+		assert.equal(sprintf("|%*s|", 4, "sheetjs"), "|sheetjs|");
+		assert.equal(sprintf("|%*.*s|", 4,  3, "sheetjs"), "| she|");
+		assert.equal(sprintf("|%*.*s|", 4,  2, "sheetjs"), "|  sh|");
+		assert.equal(sprintf("|%*.*s|", 4,  1, "sheetjs"), "|   s|");
+		assert.equal(sprintf("|%*.*s|", 4,  0, "sheetjs"), "|    |");
+		assert.equal(sprintf("|%*.*s|", 4, -1, "sheetjs"), "|sheetjs|");
+	});
 });