diff --git a/extensions/theme-seti/build/update-icon-theme.js b/extensions/theme-seti/build/update-icon-theme.js
index 399bbb8ae5130c921aa05e83a91ab3d7737a8fd5..18e732e328afba929d5f5f4219ed5633d41fe2be 100644
--- a/extensions/theme-seti/build/update-icon-theme.js
+++ b/extensions/theme-seti/build/update-icon-theme.js
@@ -200,9 +200,9 @@ exports.update = function () {
 				let def = '_' + match[2];
 				let colorId = match[3];
 				if (pattern[0] === '.') {
-					ext2Def[pattern.substr(1)] = def;
+					ext2Def[pattern.substr(1).toLowerCase()] = def;
 				} else {
-					fileName2Def[pattern] = def;
+					fileName2Def[pattern.toLowerCase()] = def;
 				}
 				def2ColorId[def] = colorId;
 			}
diff --git a/extensions/theme-seti/icons/vs-seti-icon-theme.json b/extensions/theme-seti/icons/vs-seti-icon-theme.json
index 2e48bdfc08425266cf3ae4cb2e3755c85c83688d..9664501aef09ff1250edc22cb35bc877242a43ed 100644
--- a/extensions/theme-seti/icons/vs-seti-icon-theme.json
+++ b/extensions/theme-seti/icons/vs-seti-icon-theme.json
@@ -857,33 +857,23 @@
 		"editorconfig": "_editorconfig",
 		"slugignore": "_config",
 		"tmp": "_clock",
-		"DS_Store": "_ignored"
+		"ds_store": "_ignored"
 	},
 	"fileNames": {
 		"mix": "_hex",
 		"karma.conf.js": "_karma",
 		"karma.conf.coffee": "_karma",
 		"bower.json": "_bower",
-		"Bower.json": "_bower",
 		"dockerfile": "_docker",
-		"Dockerfile": "_docker",
-		"DOCKERFILE": "_docker",
-		"Gruntfile.js": "_grunt",
-		"gruntfile.babel.js": "_grunt",
-		"Gruntfile.babel.js": "_grunt",
 		"gruntfile.js": "_grunt",
-		"Gruntfile.coffee": "_grunt",
+		"gruntfile.babel.js": "_grunt",
 		"gruntfile.coffee": "_grunt",
-		"GULPFILE": "_gulp",
-		"Gulpfile": "_gulp",
 		"gulpfile": "_gulp",
 		"ionic.config.json": "_ionic",
-		"Ionic.config.json": "_ionic",
 		"ionic.project": "_ionic",
-		"Ionic.project": "_ionic",
-		"LICENSE": "_license",
-		"Procfile": "_heroku",
-		"TODO": "_todo",
+		"license": "_license",
+		"procfile": "_heroku",
+		"todo": "_todo",
 		"npm-debug.log": "_npm_ignored"
 	},
 	"languageIds": {
@@ -1031,7 +1021,7 @@
 			"editorconfig": "_editorconfig_light",
 			"slugignore": "_config_light",
 			"tmp": "_clock_light",
-			"DS_Store": "_ignored_light"
+			"ds_store": "_ignored_light"
 		},
 		"languageIds": {
 			"csharp": "_c-sharp_light",
@@ -1072,25 +1062,15 @@
 			"karma.conf.js": "_karma_light",
 			"karma.conf.coffee": "_karma_light",
 			"bower.json": "_bower_light",
-			"Bower.json": "_bower_light",
 			"dockerfile": "_docker_light",
-			"Dockerfile": "_docker_light",
-			"DOCKERFILE": "_docker_light",
-			"Gruntfile.js": "_grunt_light",
-			"gruntfile.babel.js": "_grunt_light",
-			"Gruntfile.babel.js": "_grunt_light",
 			"gruntfile.js": "_grunt_light",
-			"Gruntfile.coffee": "_grunt_light",
+			"gruntfile.babel.js": "_grunt_light",
 			"gruntfile.coffee": "_grunt_light",
-			"GULPFILE": "_gulp_light",
-			"Gulpfile": "_gulp_light",
 			"gulpfile": "_gulp_light",
 			"ionic.config.json": "_ionic_light",
-			"Ionic.config.json": "_ionic_light",
 			"ionic.project": "_ionic_light",
-			"Ionic.project": "_ionic_light",
-			"LICENSE": "_license_light",
-			"Procfile": "_heroku_light",
+			"license": "_license_light",
+			"procfile": "_heroku_light",
 			"npm-debug.log": "_npm_ignored_light"
 		}
 	},