diff --git a/analysis_options.yaml b/analysis_options.yaml
new file mode 100644
index 0000000..59964a7
--- /dev/null
+++ b/analysis_options.yaml
@@ -0,0 +1,7 @@
+analyzer:
+  strong-mode: true
+
+linter:
+  rules:
+    - cancel_subscriptions
+    - close_sinks
\ No newline at end of file
diff --git a/tool/dev.dart b/tool/dev.dart
index 9341572..0e5c3ca 100644
--- a/tool/dev.dart
+++ b/tool/dev.dart
@@ -6,6 +6,7 @@ main(List<String> args) async {
   List<String> directories = ['example/', 'lib/', 'test/', 'tool/'];
 
   config.analyze.entryPoints = directories;
+  config.analyze.strong = true;
   config.format.directories = directories;
   config.test
     ..platforms = ['vm']