diff --git a/package.json b/package.json
index aae9b56..cc2b527 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "xlsx",
-	"version": "0.0.8",
+	"version": "0.0.9",
 	"author": "Niggler",
 	"description": "(one day) a full-featured XLSX parser and writer.  For now, primitive parser",
 	"keywords": [
diff --git a/xlsx.js b/xlsx.js
index cc68e8d..ae59a47 100644
--- a/xlsx.js
+++ b/xlsx.js
@@ -121,12 +121,13 @@ function parseSheet(data) { //TODO: use a real xml parser
 				case 'n': p.v = parseFloat(p.v); break;
 				case 's': p.v = strs[parseInt(p.v, 10)].t; break;
 				case 'str': break; // normal string
-                case 'b':
-                    //Parse a boolean.
-                    //I'm not sure how robust this method is.
-                    p.v = Boolean(p.v);
-                    break;
-				default: throw "Unrecognized cell type [" + p.t + "] with value: " + p.v;
+				case 'b':
+					switch(p.v) {
+						case '0': case 'FALSE': case "false": case false: p.v=false; break;
+						case '1': case 'TRUE':  case "true":  case true:  p.v=true;  break;
+						default: throw "Unrecognized boolean: " + p.v;
+					} break;
+				default: throw "Unrecognized cell type: " + p.t;
 			}
 			//s.cells[cell.r] = p;
 			s[cell.r] = p;
@@ -396,6 +397,7 @@ function sheet_to_csv(sheet) {
 		switch(val.t){
 			case 'n': return val.v;
 			case 's': case 'str': return JSON.stringify(val.v);
+			case 'b': return val.v ? "TRUE" : "FALSE";
 			default: throw 'unrecognized type ' + val.t;
 		}
 	};