diff --git a/Dart.gitignore b/Dart.gitignore
index 7c28044..4b36658 100644
--- a/Dart.gitignore
+++ b/Dart.gitignore
@@ -1,27 +1,33 @@
 # See https://www.dartlang.org/tools/private-files.html
 
 # Files and directories created by pub
-.buildlog
+
+# SDK 1.20 and later (no longer creates packages directories)
 .packages
-.project
 .pub/
 build/
+
+# Older SDK versions
+# (Include if the minimum SDK version specified in pubsepc.yaml is earlier than 1.20)
+.project
+.buildlog
 **/packages/
 
+
 # Files created by dart2js
 # (Most Dart developers will use pub build to compile Dart, use/modify these 
 #  rules if you intend to use dart2js directly
 #  Convention is to use extension '.dart.js' for Dart compiled to Javascript to
 #  differentiate from explicit Javascript files)
 *.dart.js
 *.part.js
 *.js.deps
 *.js.map
 *.info.json
 
 # Directory created by dartdoc
 doc/api/
 
 # Don't commit pubspec lock file 
 # (Library packages only! Remove pattern if developing an application package)
 pubspec.lock