diff --git a/lib/staticGzip.js b/lib/staticGzip.js
index 400f385..baa0c88 100644
--- a/lib/staticGzip.js
+++ b/lib/staticGzip.js
@@ -82,13 +82,16 @@ exports = module.exports = function staticGzip(dirPath, options){
 			staticSend(req, res, next, o);
 		}
 		
-		function sendGzipped(data) {
+		function sendGzipped(cacheObj) {
 			contentType = contentType + (charset ? '; charset=' + charset : '');
 			res.setHeader('Content-Type', contentType);
 			res.setHeader('Content-Encoding', 'gzip');
 			res.setHeader('Vary', 'Accept-Encoding');	
-			res.setHeader('Content-Length', data.length);
-			res.end(data, 'binary');
+			res.setHeader('Content-Length', cacheObj.content.length);
+			res.setHeader('Last-Modified', cacheObj.mtime);
+			res.setHeader('Date', (new Date()).toUTCString());
+			res.setHeader('Expires', (new Date((new Date()).getTime()+maxAge)).toUTCString());
+			res.end(cacheObj.content, 'binary');
 		}
 		
 		function gzipAndSend(filename, gzipName, mtime) {
@@ -98,7 +101,7 @@ exports = module.exports = function staticGzip(dirPath, options){
 					'mtime': mtime,
 					'content': gzippedData
 				};
-				sendGzipped(gzippedData);
+				sendGzipped(gzippoCache[gzipName]);
 			});	
 		}
 		
@@ -121,7 +124,7 @@ exports = module.exports = function staticGzip(dirPath, options){
 		if (!~acceptEncoding.indexOf('gzip')) {
 			return pass(filename);
 		}
-		
+
 		//This is storing in memory for the moment, need to think what the best way to do this.
 		//Check file is not a directory
 		
@@ -133,19 +136,32 @@ exports = module.exports = function staticGzip(dirPath, options){
 			var base = path.basename(filename),
 					dir = path.dirname(filename),
 					gzipName = path.join(dir, base + '.gz');
+			
+			if (req.headers['if-modified-since'] &&
+				gzippoCache[gzipName] &&
+				(new Date(gzippoCache[gzipName].mtime)).getTime() <= (new Date(req.headers['if-modified-since'])).getTime()) {
+				contentType = contentType + (charset ? '; charset=' + charset : '');
+				res.setHeader('Content-Type', contentType);
+				res.setHeader('Content-Encoding', 'gzip');
+				res.setHeader('Vary', 'Accept-Encoding');
+				res.setHeader('Last-Modified', gzippoCache[gzipName].mtime);
+				res.setHeader('Date', (new Date()).toUTCString());
+				res.setHeader('Expires', (new Date((new Date()).getTime()+maxAge)).toUTCString());
+				return res.send(304);
+			}
 					
 			//check for pre-compressed file 
 			//TODO: Look into placing into a loop and using dot notation for speed improvements. 
 			if (typeof gzippoCache[gzipName] === 'undefined') {
-				gzipAndSend(filename, gzipName, stat.mtime);
+				gzipAndSend(filename, gzipName, (new Date(stat.mtime)).toUTCString());
 			} else {
         if ((gzippoCache[gzipName].mtime < stat.mtime) || 
           ((gzippoCache[gzipName].ctime + maxAge) < Date.now())) {
-					gzipAndSend(filename, gzipName, stat.mtime);
+					gzipAndSend(filename, gzipName, (new Date(stat.mtime)).toUTCString());
 				} else {
-					sendGzipped(gzippoCache[gzipName].content);
+					sendGzipped(gzippoCache[gzipName]);
 				}
 			}
 		});
 	};
-};
\ No newline at end of file
+};
diff --git a/test/staticGzipTest.js b/test/staticGzipTest.js
index ff3723a..8ad73db 100644
--- a/test/staticGzipTest.js
+++ b/test/staticGzipTest.js
@@ -109,5 +109,29 @@ module.exports = {
 				res.headers.should.have.property('content-encoding', 'gzip');
 			}
 		);
+	},
+	'requesting gzipped utf-8 file second time caches': function() {
+		assert.response(app,
+			{
+				url: '/utf8.txt',
+				headers: {
+					'Accept-Encoding':"gzip",
+				}
+			},
+			function(res) {
+				assert.response(app,
+					{
+						url: '/utf8.txt',
+						headers: {
+							'Accept-Encoding':"gzip",
+							'If-Modified-Since': 'Mon, 28 Dec 2020 01:00:00 GMT'
+						}
+					},
+					function(res) {
+						res.statusCode.should.equal(304);
+					}
+				);
+			}
+		);
 	}
-};
\ No newline at end of file
+};